Question

For y = 4x + 2x2 – x3, show how to find the value for y, when x = 2. Show your work

Answer 1

In that equation, I'd say the 2x2 means "2x squared" and x3 means "x cubed" correct?

Answer 2

Yes that's right! Sorry I didn't put that!

Answer 3

We have the equation
y = 4x + 2x2 – x3
and we want to determine "y" when x=2
4*2 =?
+ 2 * 2 * 2 = ?
-2 * 2 * 2 =?

Answer 4

Okay what is 4*2 ?

Answer 5

Sorry I've been busy! And I actually worked out the problem and got 8!! Is that correct??

Answer 6

Correct :)

Answer 7

Thank You!!!!

Answer 8

Anytime! (:

Answer 9

Hey maybe you can help me? I don't know how to ask another question on here? Can you tell me how? Thanks!!!!

Answer 10

You'll need to "close" the current question to open another one :)

Answer 11

Okay thanks again!!!!