Question

Find the value of k if (x+k) is a factor of the polynomial x3+kx2-2x+k+4

Answer 1

let
f(x)= x3+kx2-2x+k+4
x+k is a factor of f(x) therefore f(-k)=0

(-k)^3+k×k^2-2×k+k+4=0

-k^3+k^3-2k+k+4=0

-2k+k+4=0

-k+4=0

-k= -4

k=4

Answer 2

Answer:

-4/3

Step-by-step explanation:

hope you get the answer