Question

F(x)=-x^2-4x-19

Find f(−9)

Answer 1

-64.

Explanation:

f(x)=-x^2-4x-19 Replacing x by -9:-

f(-9)= -(-9)^2-4(-9)-19

= -81 + 36 - 19

= 36 - 100

= -64.

Answer 2

-64

Explanation:

f(x)=-x^2-4x-19

Let x = -9

f(-9) = - (-9)^2 -4(-9) -19

= -81 +36 -19

=-64