Question

G(a)=2a+4
f(a)=a-4
find (g-f)(-7)

Answer 1

1

Explanation:

note (g - f )(a) = g(a) - f(a)

g(a) - f(a)

= 2a + 4 - (a - 4)

= 2a + 4 - a + 4

= a + 8

Thus

(g - f)(- 7) = - 7 + 8 = 1