Question

f(-8) evaluate the function

Answer 1

Answer:

f(x)=-2x²+2x-20

Replacing x with -8 , we get

f(-8)=-2(-8)²+2(-8)-20

=-2×64-16-20

=-128-16-20

=-164

Answer 2

Solution:

$f(x) = - 2x^{2} + 2x - 20 \\ = > f( - 8) = - 2 {( - 8)}^{2} + 2( - 8) - 20 \\ = - 2(64) - 16 - 20 \\ = - 128 - 16 - 20 \\ = - 164$

Answer:

The answer is -164.