Question

Let f(x)=x^2+3x-4 and g(x)=x+5. Find f(x)•g(x)

a. x^3+3x^2+16x-20
b. x^3+5x^2+14x-20
c. x^3-8x^2+11x-20
d. x^3+9x^2+19x-20

Answer 1

none of them is correct. Option c would have been correct if it was +8x² instead of -8x².

Answer 2

C is the answer

Explanation: