Question

Consider the polynomial function f(x) = x3 + 4x2 + kx - 36. Find the value of k so that x + 4 is a factor of f.

Answer 1

K= -9

Explanation:

X+4 is a factor of f

so substitute x+4=D

X=(-4 in it)

(-4)3+4(-4)2-4k-3b=0

-9k= 36

so k equals -9

The paper I did: