Question

Find and simplify f(-x)-f(x) for given function of f.
f(x)=9x^3+2x^2+8x-11
f(-x)-f(x)=?

Answer 1

f(x)=9x^3+2x^2+8x-11
f(-x) = ?
Replace every instance of x by -x:
f(-x) = 9(-x)^3 + 2(-x)^2 + 8(-x) - 11
f(-x) = -9x^3 + 2x^2 - 8x - 11
f(x) = 9x^3 + 2x^2 + 8x - 11
subtract:

Answer 2

subtract what?

Answer 3

f(-x)-f(x)

Answer 4

You are to take away the polynomial labeled f(x) from the polynomial labeled f(-x)

Answer 5

Aum are actually found f(-x) for you
The subtraction is left to you.

Answer 6

im confused

Answer 7

f(-x) is -9x^3+2x^2-9x+11
f(x) is 9x^3+2x^2+8x+11

Answer 8

You are to find f(-x)-f(x)

Answer 9

so put the two together?

Answer 10

(-9x^3+2x^2-9x+11)-(9x^3+2x^2+8x+11)

Answer 11

You do the subtraction that it tells you

Answer 12

so just x is the answer?

Answer 13

(-9x^3+2x^2-8x+11)-(9x^3+2x^2+8x+11)
...
so -9-9=? 2-2=? -8-8=? 11-11=?

Answer 14

is it +11 for both of them? or -11?

Answer 15

+11. got the answer. thanks!