Question

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

Answer 1

Can you clarify the question, please? When reading the problem, there is a few errors. Did you mean --\[y=4x+2x^2-x^3\]
the way you have it written, it looks like y=4x+ (2*2)-x(3).

Answer 2

yes i did

Answer 3

@iGreen, I think you'd be better at helping her than I would.

Answer 4

\(4(2) + 2(2)^2 – (2)^3\)

Simplify

Answer 5

okay

Answer 6

What's 4 * 2

Answer 7

that would be 8

Answer 8

so 2(2) which = 2*2 would equal to 4 right

Answer 9

Sari, For every x you see in the problem, replace it with the number 2. so its going to look like this


\[4(2)+2(2)^2-2^3\]

so, you should be able to go from there.

Answer 10

okay

Answer 11

Sari, 4(2) just means Four times two. so. 4(2)= 8
2(2)^2 is equal to 8 aswell, and so is 2^3.

so, youre left with 8+8-8. I think you can handle that.

Answer 12

yes thanks

Answer 13

8+8-8=8 correct

Answer 14

Yes. You got it :p

Answer 15

so what's the aswer 8

Answer 16

i mean y=8

Answer 17

You are correct :)

Answer 18

thank you

Answer 19

Your'e Welcome