Answer:
-10
Step-by-step explanation:
Find f(x) = - x^2 + 2x first
f(3) = -(3)^2 + 2(3)
f(3) = - 9 + 6
f(3) = - 3
Now do f(3) - 7
f(3) - 7 = - 3 - 7
f(3) - 7 = - 10
