Question

Find the value of k, if x + 2 is a factor x^2 + kx +6.
​

Answer 1

Answer:

Step-by-step explanation:

x+2 is a factor of x^2+kx+6

therefore,x= -2

and as x+2 is a factor of x^2+kx+6,so if we put the value of x= -2

then the polynomial should be equal to 0.

therefore,

(-2)^2+k(-2)+6=0

4+(-2k)+6=0

-2k= -6-4

-2k= -10

2k=10

k=5