You don't really need a calculator. Rewrite 125 as 5^3. Bring the 3 down and cancel with the 3 in the denominator. Then you have e^ln(5) which is 5.
@flavius9899
2 жыл бұрын
@@onyeka2265 if you rewrite 125 as 5^3 you don't even need logarithms lol
@ilbutti6796
2 жыл бұрын
@@flavius9899 noo, non l'avrei mai detto
@mateoruiz1311
2 жыл бұрын
@@flavius9899 you could also rewrite it at 125 ^ 1/3 (or the cube root of 125), ln cancels out, and you get 5!
@kjl3080
2 жыл бұрын
@flavio Sorbo you missed the joke *this* hard
@Plasmacticus
2 жыл бұрын
when you go back to the first level after beating the game:
@alejrandom6592
2 жыл бұрын
Lol
@フアン-f6e
2 жыл бұрын
Lol
@PeerlessChad
2 жыл бұрын
XD
@shanewright4650
2 жыл бұрын
ahh this is so accurate
@faseplay.
2 жыл бұрын
After playing celeste, this is SO ACCURATE
@Ninja20704
2 жыл бұрын
My one of my classmates did something even funnier. One time it was r^3 = 216. What he did was turn it into r^3-216=0, and then factored using the difference of two cubes formula, and then took like 5 more lines just to find the quadratic part has no real solution.
@sartajdhaliwal9462
2 жыл бұрын
i mean... he could get the imaginary solutions that way, I guess?
@nathanjiang100
2 жыл бұрын
he has a video that did that with x^3 = 1 lol. forgot if it was on fast! or bprp
@anshulgoyal9095
2 жыл бұрын
What's even better is that to get the answer you need to know what the cuberoot of 216 is, so that you can split it with difference of two cubes, and that's exactly what you're trying to find
@aweebthatlovesmath4220
2 жыл бұрын
@@sartajdhaliwal9462 one of them should be the real Answer of that
@Firefly256
2 жыл бұрын
Nah we prove and use cubic formula
@azazazlmlmlm
2 жыл бұрын
X^3=125 X^(3) = (1+2)5 X=5 P/s: I didn't think I'd get this far...
@justarandomlol
2 жыл бұрын
Wtf? So (1+2)*5 =125?
@42cyborg65
2 жыл бұрын
@@justarandomlol exactly
@evo888s
2 жыл бұрын
What
@subject_84
2 жыл бұрын
No… you would just take the cubed rot if 125 which is 5 so x=5
@omi_naik
2 жыл бұрын
Habibi method 😂
@dawidekczerwinski
2 жыл бұрын
That's how your brain functions after studying college level maths, can't help getting a little fancy
@stefanchandra1237
2 жыл бұрын
can relate this is what i literally do whenever i see simple problems on the internet lol
@dawidekczerwinski
2 жыл бұрын
@@stefanchandra1237 nice username. I'm top fan of Your Reality track on Spotify with over 600 times played last year
@zurps
2 жыл бұрын
True but this is not college level math?
@viletic
2 жыл бұрын
@@zurps high school
@collegestudent6071
2 жыл бұрын
Cocky freshman yeah
@reidpattis3127
2 жыл бұрын
The idea is good. I commend your student for that. But if he were to simplify the expression further, he would have to calculate the cubed root of 125 anyways.
@theimmux3034
2 жыл бұрын
I think that just might be the point of this video
@jeeteshsawarkar1808
2 жыл бұрын
Everyone knows 5 cubed is 125
@jeeteshsawarkar1808
2 жыл бұрын
So its just waste of time ig Or they did it for fun
@erenyayger3840
2 жыл бұрын
@@jeeteshsawarkar1808 r/woosh 😄
@mattmartin7028
Жыл бұрын
I think it's just how they have to prove it. You can't just write the answer without showing how you got it. Maybe I'm wrong.
@Topshow777
2 жыл бұрын
When you become a software engineer and want to print hello world
Khaby then comes in with the cube root and solves it in one step
@robbyandrews6318
2 жыл бұрын
2 ROOT PIE OVER V OF X WHERE IS PIE> WHAT I DONT UNDERSTAND IS HOW MANY LETTERS ARE IN YOUR ALPHET?? DID I SPELL THAT RONG... LOL
@rayane--21pilots8
2 жыл бұрын
@@robbyandrews6318 sheesh u gotta chill m8
@anandu6859
2 жыл бұрын
The roots of the equation are 5, 5ω, 5ω^2 (where ω= (-1±√3i)/2
@David-qr5sq
2 жыл бұрын
Continued x=cbrt(e^ln(125)) x=cbrt(125) x=5
@Nano-n
2 жыл бұрын
Does cbrt means cube root?
@boston5814
2 жыл бұрын
@@Nano-n no, it means Cuberto, the digital design and development agency.
@abhimanyupandey8170
2 жыл бұрын
@@boston5814 ah damn, it all makes sense now! thanks a lot
@boston5814
2 жыл бұрын
@@abhimanyupandey8170 yep no problem, any more questions, send them this way!
@anshumanagrawal346
2 жыл бұрын
@@Nano-n ofc
@liviu445
2 жыл бұрын
I actually want to cry that I can understand this humor, where as a year ago I was totally scared of mathematics and barely passed it, I'm going to finish my business degree, and get another degree in mathematics, thank you.
@TheMartian11
2 жыл бұрын
I mean... It's just highschool level maths though. Every 16-17 year old knows this
@TheMartian11
2 жыл бұрын
@@dororj7338 I have seen the US syllabus for maths, it doesn't really make sense to me as most of what you guys study in calc 1 and 2 is Mandatory syllabus in 11th and 12th grade for us, including elementary linear algebra(vector algebra, 3d coordinate system, matrices and determinants), and a decent portion of statistics.
@liviu445
2 жыл бұрын
@@TheMartian11 well they don't teach logs or calculus in the UK, so to understand this humor in a couple of months it's not bad.
@williamallen9145
Жыл бұрын
@@liviu445 They do; the whole of A-Level is pretty much based on calculus.
@liviu445
Жыл бұрын
@@williamallen9145 Yeah, i was dumb while i made this comment.
@freddern3099
2 жыл бұрын
when they have access to calculator and dont use cube root
@andrycraft69
2 жыл бұрын
It's funny because I was here thinking "I don't see anything wrong. Isn't this how you are supposed to solve this equation?" Then I looked at the comments, realized the joke and then realized the simplicity of the question.
@copiryte9535
2 жыл бұрын
smh here's the full proof x= e^(ln(125))/3 Therefore x =e^((ln(125))1/3 x =125^1/3 this is obviously 5 QED
@Lemonade6969
Жыл бұрын
The teacher: Only my method will be followed in the exam The teacher's method
@rohitranjan4416
2 жыл бұрын
It could also be like Ln x³ = ln 125 3 ln x = ln 5³ 3 ln x = 3 ln 5 Ln x = ln 5 By comparing x = 5 "Life is Simple , we make it difficult "
@Ilm_Seekers
2 жыл бұрын
😂😂😂😂
@broombroom557
Жыл бұрын
Or just cube root
@tanacko118
2 жыл бұрын
I love how you cut that video in the end
@zitronenwasser
2 жыл бұрын
Lmfao i was literally thinking "hm? what's the problem here?", don't think i would have done it this way, but i didn't realize that it was overcomplicated for some reason
@oskx_rl
Жыл бұрын
If we are working with real numbers there's only 1 solutions, but there are 2 More in complex, Let me get all answers. x³=125 ⬜Substract 125 on both sides x³-125=125-125 x³-125=0 ⬜Rewrite 125 as 5³ x³-5³=0 ⬜A difference of cubes a³-b³ can be written as (a-b)(a²+ab+b²) Letting a=x, b=5 x³-5³=0 (x-5)(x²+x•5+5²)=0 (x-5)(x²+5x+25)=0 ⬜If ab=0, a=0 or b=0 x-5=0 or x²+5x+25=0 ◼️Solve for x-5=0 x-5=0 ⬜Add 5 on both sides x-5+5=0+5 x=5 ◼️Solve for x²+5x+25=0 by formula Formula: x=[ -b±√(b²-4ac) ] / 2a Having a=1, b=5, c=25 x²+5x+25=0 x =[ -5+√(5²-4(1)(25)) ] / 2(1) x =[ -5±√(25-4(25)) ] / 2 ⬜Factor 25 x =[ -5±√(25(1-4)) ] / 2 x =[ -5±√(25•(-3)) ] / 2 ⬜Rewrite 25 as 5² and expand the root x =[ -5±√5² • √-3 ] / 2 ⬜ Rewrite -3 as 3•(-1) and expand the root x =[ -5±5√3 • √-1] / 2 ⬜i²=-1 or i=√-1 x =[ -5±5√3 • i] / 2 x =[ -5±5i√3 ] / 2 Therefore x₁ = 5 x₂ = (-5+5i√3) / 2 x₃ = (-5-5i√3) / 2 1 real solution 2 complex solutions, i² = -1
@anujpandey2083
2 жыл бұрын
oh thnx now i can use the calculator ...initially it was hard
@sankalpmishra3114
2 жыл бұрын
This is the easiest short cut trick I have ever seen in my life for finding cube of a number
@Ryanisthere
2 жыл бұрын
"wtf is a cube root" -bprp probably
@Im_Quartz
2 жыл бұрын
I love how u made it like 5 times more complicated than it should be.
@quetzalcoatlustheflyinggir5111
2 жыл бұрын
5³ more complicated?
@anjugour9295
2 жыл бұрын
From now onwards I will not able to convince myself directly that solution of x³=125 is 5
@siege.4113
7 ай бұрын
Guys it’s a joke stop saying he’s doing it wrong just admire the creativity.
@henrytang2203
2 жыл бұрын
Dude, you missed two complex roots.
@NicholasOfAutrecourt
10 ай бұрын
Seems to be a solution geared toward first-year algebra students.
@kechan_
2 жыл бұрын
"smart people don't understand jokes" -sun tzu the art of mathematics
@molk1217
2 жыл бұрын
Anime nerd
@kechan_
2 жыл бұрын
@@molk1217 thank you
@molk1217
2 жыл бұрын
@@kechan_ thank you denied
@shanewright4650
2 жыл бұрын
well, I guess I'm something of a genius myself
@molk1217
2 жыл бұрын
Me too
@braunii0
2 жыл бұрын
Me: "5, no need for unnecessary equations)
@Deepdoot24
2 жыл бұрын
This is a very useful beginner introduction to logarithms!
@Ethan-lk6hk
2 жыл бұрын
Me in the 8th grade who just cube rooted it and found the answer without calculator- I like your funny word magic man
@bobingstern4448
2 жыл бұрын
Just remember to use logs only when the exponent is a variable, that usually works for me
@Pixiltation
10 ай бұрын
bro i really just accidentally found the answer by replacing x to 5
@_Just_Another_Guy
9 ай бұрын
I wish I understood this quick trick back in undergrad in the late 2000's when I was taking calculus courses. Still passed but it was literal torture. My math professor wasn't very good at explaining. Basically, the steps when an exponent on a variable is involved is to: - take _ln_ on both sides so exponent can be brought down - isolate the variable - take _e_ on both sides to cancel out the _ln_ on the variable - now just do basic algebra to solve for the variable
@finmat95
2 жыл бұрын
The most efficient solution
@farhansyabibi170
2 жыл бұрын
Future Ultron after watching this video : Self-conscious lvl 100
@sipho5533
2 жыл бұрын
Wow, 60seconds of my life that I'll never get back
@randomgamer-te8op
Жыл бұрын
+ the time you spended writting this comment and maybe reading this one
@soupisfornoobs4081
10 ай бұрын
Do you usually get time back? What makes these 60s remarkable?
@sivapgt8074
2 жыл бұрын
Meanwhile Cube Root: 🙄
@svenkonings9822
6 ай бұрын
Well actually a cubic equation has three equations, only 2 of them are complex roots (so solutions that have imaginary numbers), and real root being 5.
@wentywebster1141
2 жыл бұрын
I just graduated elementary, but I'm gonna save this video for when I understand what on earth he's saying
@anonympeace7514
2 жыл бұрын
First thought: Yeah, it's 5 and now?
@Daniel31216
9 ай бұрын
This has 3 solutions.
@teddonaville1151
2 жыл бұрын
wow its an interesting discovery that e to the 3 times logx is just 3rd root of x
@soupisfornoobs4081
2 жыл бұрын
Logarithm properties, logx^k = k*logx and e^logx = x
@KossuMandoliini
2 жыл бұрын
Funny how I was just taught natural logarithm 2 hours ago and now this is on my recommendations
@xclassic6000
2 жыл бұрын
me: memorized cubes till 10
@jaycubes
Жыл бұрын
why did i feel like this would be more efficient than a cube root for a solid 10 seconds....
@Firefly256
2 жыл бұрын
Wait which step loses complex answers?
@want-diversecontent3887
2 жыл бұрын
e^ln(125)/3 = 5
@lt2143
Жыл бұрын
dude's making it more complicated than it actually is.
@JesseGuadarrama629
2 жыл бұрын
This stresses me out to the maxxxx!!! Where did the ln come from?! 😭
@someoneinseasia336
10 ай бұрын
The audio cut at the end is *immaculate* 💀
@margamingshorts6471
2 жыл бұрын
We could also just find the cube root lol
@braillejansen9109
2 жыл бұрын
Now i know what my dog feels when i talk to him
@benh2678
2 жыл бұрын
Love this format
@Robin-Dabank696
6 ай бұрын
That cutoff was gold
@NonTwinBrothers
2 жыл бұрын
Lmaooo
@MCstudios_
2 жыл бұрын
Bro... It's 5. No need to write a declaration of independence to solve any "mathematical problem".
@arkdotgif
2 жыл бұрын
someone clearly didn’t watch the whole video
@kobethebeefinmathworld953
2 жыл бұрын
殺雞偏用牛刀 XD
@same_1110
2 жыл бұрын
重點是最後還用calculator 整個笑死
@numericalmethodsguy
2 жыл бұрын
This method can be transferred to many other problems. That is why he is showing it like that.
@BuiTanDung
2 жыл бұрын
0:18
@dalibormaksimovic6399
2 жыл бұрын
This is exact moment blackpenredpen became student.
@chrisyeung8623
2 жыл бұрын
Cube root of 125 is 5 So 5 cube is 125 Solved
@vaccino3359
2 жыл бұрын
You can just keep dividing by five too since we know that 125 is a perfect square and 5 is the unit's place.
@rafjeevarafjeeva5952
10 ай бұрын
x³=125 I pose x=a+bi (with a and b two reals numbers) (a+bi)³=125 a³+3a²bi-3ab²-b³i=125 (a³-3ab²)+(3a²bi-b³i)=125+0i So we have the system: a³-3ab²=125 3a²b-b³=0 b(3a²-b²)=0 So either b=0 or 3a²-b²=0 if b=0 we have a³-3ab²=a³=125 (with a a real number) a1=5 and b1=0 x1=a1+b1×i=5+0i=5 If b≠0 3a²-b²=0 b²=3a² So a³-3ab²=a³-3a²×3a²=-8a³=125 a³=-125/8 a= -(5/2) a²=25/4 3a²=75/4 b²=3a²=75/4 so b=sqrt(75)/2 or b=-sqrt(75)/2 So we have a1=5. b1=0 a2=-5/2. b2=sqrt(75)/2 a3=-5/2. b3=-sqrt(75)/2 x1=a1+ib1=5+0i=5 x2=a2+ib2=(-5+i×sqrt(75))/2 x3=a3+ib3=(-5-i×sqrt(75))/2
@MoguMogu818
10 ай бұрын
Me when I was helping my friends in colllege Algebra do a simple rational function after three semesters of calculus, linear algebra, and applied physics.
@Topshow777
2 жыл бұрын
When you become a head chef and want to make instant ramen :-
@shybot1965
10 ай бұрын
Guys, don't use a calculator. Here's how you simplify that equation - x=e^(ln(125)/3) x=e^(ln(5³)/3) x=e^(3ln(5)/3) x=e^(ln(5)) now, using e^ln(x) = x we get x=5
@eitanchess
6 ай бұрын
"WHAT THE F#CK IS A CUBE ROOT 🦅🦅🦅"
@HimadriSaha99
2 жыл бұрын
Solving it as: x^3 - 5^3 = 0 (x-5)(x-5w)(x-5w^2) = 0 Giving x = 5, 5w, 5w^2 the absolute chad way
@flaht3964
2 жыл бұрын
yea i did same solution. It has 3 roots .2 of them are just complex
@LJTTYT
9 ай бұрын
Congratulations you made the question much harder than it actually is.
@mi-kun9855
Жыл бұрын
High school kid be like - that's 5 ...he starts explaining.... Kid - wtf!!
@JoyboyOnly
Жыл бұрын
" I've seen this one it's a classic " *avg Asian enters*
@vejishin
Жыл бұрын
That was a good method, learned alot from this little thing. But not sure why people want to simplify everything; sometime doing the hard way gives alot of experience.
@theowulfanxiesen134
10 ай бұрын
I’d love to see this with an example I wasn’t able to pick up on at the same sped at which I know my times tables
@Sky30w0
11 ай бұрын
the way it gets cut off as he says "five" makes this even funnier
@dannikaindira2992
2 жыл бұрын
The true asians have already memorized these by heart😂
@VishwajeetVKale
Жыл бұрын
This is how i am solving my life problems😅
@orangenostril
Жыл бұрын
Real gamers just remember the old saying "125^(2/3)=25" and go from there!
@15harsh15
2 жыл бұрын
Cant we just transpose that cube to other side to give a cube root of 125?
@Penfold8
2 жыл бұрын
Wouldn't it be easier to use the calculator to get the cube root of 125?
@Real_-ru6vc
Жыл бұрын
this is "easier way" to solve math problem that math teacher show us.
@aribirgisson7956
2 жыл бұрын
Me knowing that it is 5 by looking at it: "Sometimes my genius is almost frightening"
@Tmplar
Жыл бұрын
You could also simplify 125 to 5^3 and put the three in front of the ln so that you can simply the 3 below. Edit: or you could just avoid using the ln, simplify 125 to 5^3 and put both members under the cubed root so the ^3 goes away.
@ScienceCodeCreations
6 ай бұрын
If we want to use the ln() method, here's how: x^3 = 125 ln(x^3) = ln(125) 3ln(x) = ln(5^3) 3ln(x) = 3ln(5) ln(x) = ln(5) e^ln(x) = e^ln(5) x = 5 Or just do it the cool way and cbrt(125)
@Luka_D_Snots
2 жыл бұрын
When you are too advanced in math and eventually forgot roots be like:
@Giyga
2 жыл бұрын
i find it really funny how they go through all that to evaluate via calculator
@themainmathematicschannel43
2 жыл бұрын
When you are getting bored in class
@CalculusIsFun1
9 ай бұрын
If you consider that ln(125) = 3ln(5) the 3s cancel and the ln cancels with the e to give the answer 5.
@asdf7219
10 ай бұрын
I have a few questions from a computer hardware perspective. X^3 = 125 x= e^(1/3*ln(125)) It simplifies to x= 125^(1/3). Isn't this just a really complex way of saying we cube root both sides? How can we apply doing that by cube root instead of using e^ln... Is n-root implementation difficult by computation?- And it's fast to use linear calculation such as a^x and ln(x)? Then is ln(x) linearly computed?
@thomasford9283
Жыл бұрын
I dig Great in Algebra, and fell off the planet when I went to logarithms , but that was 40 years ago
@tzonic8655
Жыл бұрын
The design is very human
@firebird690
2 жыл бұрын
This is actually the traditional method, before calculators people used log tables for just about everything (although not usually on a perfect cube lol).
@notagain3732
2 жыл бұрын
I need to really relearn algebra first and then go back into deeper knowledge
@crew_dev
4 ай бұрын
ITS JUST THE CUBE ROOT OF 125 OMG
@idlesquadron7283
3 ай бұрын
read title its a joke
@EuZeD
Жыл бұрын
Why not using the cubic root ?
@bulaloitech
2 жыл бұрын
I don't know logarithms yet, but I think using the cube root method was easier just cube rooth both sides and then you will get x = 5 , 5^3 = 125, 125 = 125
@maxhenderson1890
5 ай бұрын
x³ = 125 ln(x³) = ln(125) = ln (5³) 3ln(x) = 3ln(5) ln(x) = ln(5) e^ln(x) = e^ln(5) x=5 Similarly you could just notice from the start that 125=5³ and since the power on the lhs equals the power on the rhs, the base must be the same so x=5
@gdtargetvn2418
2 жыл бұрын
Ok so let's just turn this into a cubic equation. x^3=125 x^3-125=0 x^3+0x-125=0 This is a cubic equation, so we're gonna apply the Cardano's formula. Since 4*0^3+27(-125)^2>0, therefore: x=cuberoot(-(-125)/2+sqrt((-125)^2/4+0^3/27)+cuberoot(-(-125)/2-sqrt((-125)^2/4+0^3/27))) aAaNd tHiS eQuAls tO fIvE
@ryanchawda
Жыл бұрын
The most alarming answer
@Red2001Rum
Жыл бұрын
Take the third root at the first level and you will get x = 5, but thank you for finding another solution for this problem.
@geminwanzo
11 ай бұрын
If to use calculator why not just enter (125)^(1/3) in the calculator in the beginning? 🤷♀️
@mubarrathasan
11 ай бұрын
Logarithms are used to retrieve powers, not base but this is a mess.
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