Question

f(x)=-5x. g(x)=8x^2-5x-9. Find: (f*g) (x)
a. -40x^4+25x^3+45x^2
b. -40x^2+25x+45x
c. -40x^3-5x-9
d. -40x^3+25x^2+45x

Answer 1

f(x) = -5x
g(x) = 8x² - 5x - 9

(f×g)(x) = ?
= ((-5x)(8x²-5x-9))
= -40x³ + 25x² + 45x → The answer Opsi D