Question

For the polynomial function, find the specified function values. f(x)=3x^3+3x^2-2 find f(0) and f(-1).

Answer 1

To find f(0), replace each x with 0. Then evaluate/simplify.

Answer 2

I got -2

Answer 3

good, do the same with -1

Answer 4

and tell me what you get

Answer 5

3

Answer 6

no, if you replace x with -1, you get


3x^3+3x^2-2

3(-1)^3+3(-1)^2-2


Do you have what I wrote so far?

Answer 7

yes

Answer 8

ok what is -1 cubed?

Answer 9

-1 i think

Answer 10

good

Answer 11

what is -1 squared

Answer 12

Ie, what is (-1)^2

Answer 13

1

Answer 14

good

Answer 15

So

3(-1)^3+3(-1)^2-2

becomes

3(-1)+3(1)-2

Answer 16

now tell me what you get

Answer 17

-2

Answer 18

perfect

Answer 19

So in the end

f(0) = -2

and

f(-1) = -2


Note: it's purely coincidental that the two values have the same outputs

Answer 20

thanks

Answer 21

you're welcome