Question

Let f(x) = x² + 4x - 6 and g(x) = x + 2, find (f • g)(x).

Answer 1

(f.g)(x) = (f×g)(x)

= (x² + 4x - 6) × ( x + 2)

= x^3 + 2x^2 + 4x^2 + 8x - 6x - 12

= x^3 + 6x^2 + 2x -12