Відео

i got the answer in like 2 seconds, but i didn’t show my work so im wrong lmfao

Why even bother teaching division? Just teach fractions. It would save anyone from the useless syntactic confusion that is represented in this video. Even better, the understanding that division is just multiplying by the reciprocal is obvious if you just go straight to fractions without bothering with that useless symbol that is not even used for that long.

Why that last step? You already simplified it with 3 to the 21. Is it because 7 is a prime?

Tysm!u had helped me a lot. 😊

Ok, "my neural network" instinctively solved it within 4 seconds as 81 - 64 = 17 which is 9² - 4³, with m=2 and n=3, which is of course a hack not a real solution 😂 Man, I love your OLD long videos 😊

A beautiful problem ❤ I got carried away and in my wrong solution x was ½ 😂 But hey, in here 3:40 isn't it easier-to-follow to express 1 as 2⁰ ? Then it becomes: 2× = 2⁰ x = 0 ..pretty much what you were doing all this long, why did you have to bring that clunky LOG right in the end when it's very unnecessary ? 😉

Since we don't care about actually finding x, assign C to equal cbrt(x) Then it becomes: 1 + 1/C = 5 Solve for C: C = 1/4 Plug in 2nd expression: 1 - 1/(2*C) = 1 - 1/(2*1/4) = 1 - 2 = -1

(log x)^2 =( log 4)^2 log x = +- log 4 = log 4, log (1/4) x = 4, 1/4

Very easy to follow thanks alot

O.k This could be done without assuming base also.

X=33

That is not final answer...the final answer should be *e^W(ln2)* instead of e^(-W(ln(0.5)))... You left it there, it's now driving me crazy 🐺😡

Nice work

Only +

That bug is going to have math phobia!

😢😢pehley tha. 😊😊😊 ab

Very good explanation!

this is what i was taught in school

It took way longer than the common way

we can use logarithms and sove easily.

Thanks buddy 😊

-3/2

I came up with a poem of my own for the cubic formula: x^3 + n*x = m x = cbrt(m/2 + sqrt(D)) + cbrt(m/2 - sqrt(D)) D = (m/2)^2 + (n/3)^3 When x is cubed and x times n, Are added and equal to m. The values of x, The goals of our quest, Here's how to calculate them. Cube roots to add, Square roots they had, Both of a term we'll call D. Square half of m, Cube third of n, Add together and see. Half of m, adds to the root, First with a sign of plus. Its little brother, Is just like the other, Except with a sign of minus. Cube rooting time, of both the brothers, Add up the roots with glee. We found our first x, But where is the next? I know there have to be three. With help from DeMoivre, Who's theorem, we love ya, There's cube roots all over the plane Yes, they're complex, But do not perplex, A new kind of numbers we gain.

Idk, maybe cause i'm a sixth grader but I'll probably learn something from this.

Revisiting this video after 1 year I solved it like this: Let t = 1/27 t^(2-x) = t^(-2) 2 - x = -2 x=4

Ok, this time I got off with a good start (actually doing the difficult bit) but got overexcited and bogged with LOGs. I'll re-visit this video in 1 year and hopefully then will solve it with ease :)

Hey Kasyanno, I just re-watched it now 1 year afterwards, much to my surprise I solved it WITH EASE and in a completely different way to yours. All I had to do was "power up" both sides of this equation to the power of 1/5. So it became this: (x/5)^(x/5) = 5 ^(25/5) leading to x/5 = 5; x = 25 Thank you, man, your videos got me started. Just 1 years and 3 months ago Yоutu6е would show me your exponential equation challenges and I would scratch my head (in shame) asking myself "what is even LOG ? It's a high time for me to find out !!!"

Alright but what if we cant take a common out or if theres no x^2 term or x term?? Im askin this cuz the explanation is so good

As other people pointed out, you made an error: the square root of x^2 is *only* equal to +3. You would have to take the inverse function of x^2, whose result is ±3.

Still doesnt give what x or y is but i guess that wasnt the question

Fabulous 🤩

I don’t see what people are saying in the comments, All the x values you solved are correct when plugged back into the original equation.

There is no need for math. Anything divided or times by 0 is 0. So to get 0, you put X as 0. Edit also you're incorrect cause the equation was not X minus 9 it's negative 9 times the second X.

This is wrong: x^2 -9 is a difference of squares which can be expanded into (x+3)(x-3) which produces the x’s of x=3 and x=-3. The square root function only provides positive outputs. [graph sqrt(x) on desmos]

This makes no sense

Wrong x = 3/2

X=2/3

Don’t show Terrence Howard this haha

The way you draw your 4 is a warcrime anyway good luck stranger I won’t see you again hope your life is good.

drop the base! i like exponential ecuations

You can also just do 50 percent of 20 which is clearly 10, and 30 percent of that which is clearly 3

Or you can just do it in your head like a smart person does.

So much harder than it needs to be. 30% of 50 is 15. 20% of 15 is 3.

Oh, and a lefty to boot!!! Me mum and grandmum the same

Yummy problem, a hot cocoa lover meself, danke to you!!

I don’t believe it has a solution, or at least needs more clarification around the quotient part.

what a dreadful problem

It is 1 o clock for me someone reply in like 7 hours and I’ll do it.

I don’t understand the step where you put parentheses around everything and then put a “ -1” outside. What were you doing in that step exactly?

Conjugate and u-sub is the same result.