Evaluate f(x) = 4x + 3x^2 − 5 when x = -2.
23

-1

-25

-49

f(-2) = -1

Step-by-step explanation:

One way of doing this is to substitute -2 for x in every place where x shows up:

f(x) = 4x + 3x^2 − 5  →  f(-2) = 4(-2) + 3(-2)^2 − 5  

                                 → f(-2)  = -8    + 3(4) -   5, or f(-2) = 4 - 5, or f(-2) = -1

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1

13cm

step-by-step explanation:

(apex)