Question 58499
If the f(x) is equal to -2 Then,
replace -2 for x in the problem.
Such as:

f(x)= -2x^2-3x+8

F(-2)= -2(-2)^2-3(-2)+8

rememebring your order of operations, complete the exponent first.

(-2)^2 = 4

-2(4)-3(-2)+8

Use order of operations again

-2x-4=-8
-3x-2=6

so now we should have

-8+6+8

then solve 

Therefore the F(-2) is 6