Answer:
(f + g)(- 1) = - 9
Step-by-step explanation:
note (f + g)(x) = f(x) + g(x)
f(x) + g(x)
= x - 2 + x² + x - 6 ← collect like terms
= x² + 2x - 8
To evaluate (f + g)(- 1) substitute x = - 1 into (f + g)(x), that is
(f + g)(- 1)
= (- 1)² + 2(- 1) - 8 = 1 - 2 - 8 = - 9
