Question

For f(x)=2x+1 and g(x) =x2-7, find (f*g)(x)

Answer 1

(f×g)(x) = 2x³ +x² -14x -7

Explanation:

(f×g)(x) = f(x)×g(x) = (2x +1)×(x² -7)

= 2x(x² -7) +1(x² -7)

= 2x³ -14x +x² -7

(f×g)(x) = 2x³ +x² -14x -7