Answer:
Step-by-step explanation:
Given the functions g(x) =x-6 and h(x) = 2x², we are to find the following expression;
a) (g- h)(x)
(g- h)(x) = g(x)- h(x)
(g- h)(x) = x-6- 2x²
(g- h)(x) = -2x²+x-6
b) (g+ h)(x)
(g+ h)(x) = g(x)+ h(x)
(g- h)(x) = x-6+ 2x²
(g- h)(x) = 2x²+x-6
c) To evaluate (g+h)(-1)
(g+h)(-1) = g(-1)+h(-1)
(g+h)(-1) = -1-6+ 2(-1)²
(g+h)(-1) = -7+2(1)
(g+h)(-1) = -5