Question

If f(x) = 2x2 - 5 and g(x) = x2 - 4x - 8, find (f - g)(x).

Answer 1

= x^2 +4x +3

Explanation:

f(x) = 2x^2 - 5

g(x) = x^2 - 4x - 8

(f - g)(x)=2x^2 -5 - (x^2 -4x-8)

Distribute the minus sign

= 2x^2 -5 -x^2 +4x+8

Combine like terms

= x^2 +4x +3