Question

f(x)= x exponent 2 - 8x+5 Find f(-1)

Answer 1

F(x)= (x^2) - 8x + 5
F(-1)= ((-1)^2) - 8(-1) + 5
= 1 - (-8) + 5
= 1 + 8 + 5
F(-1) = 14

Double check my work but if I read your equation properly then that should be it.