Question

How can you make x the subject in this --> y=x^3-2x^2

Answer 1

declare a state of insolvency and elect a new parliment ... is just my first instinct

Answer 2

LOL!

Answer 3

New president?

Answer 4

y=x2(x-2)

- hope you will like it

Answer 5

It's very difficult to solve for x.

Answer 6

can we make it a perfect cube?

Answer 7

We can't!

Answer 8

I knew there was something wrong!! But how can you then solve this question..if rate of change of y is 4 units per second, find rate of change at x at the given instant y=x^3-2x^2, x=3

Answer 9

rate of chage is derivatives

Answer 10

y' = 3x^2 -4x gives the rate of change at any given moment

Answer 11

So y and x are both functions in t?

Answer 12

y'= 3 x^2 x' -4 x x'

Answer 13

if x(t) = t; then x' = t' = 1

Answer 14

If they are both functions of t, then do as Imran just did above, and solve it for x'.

Answer 15

y'=4
x=3

Answer 16

but am i not supposed to use the chain rule?

Answer 17

we did

Answer 18

and is the final answer the rate of change of x?