Question

(ii) If x + 2 is a factor of p(x), then k = [1] (a) 0 (b) 4 (c) 8 (d) 12​

Answer 1

Answer:

Step-by-step explanation:

Given expression is x  

3

+kx  

2

+12x−8=0

x−2 is a factor of the given expression.

So, x=2

Substitute in the equation, we get

2  

3

+k(2)  

2

+12(2)−8=0

⇒8+4k+24−8=0

⇒4k=−24

⇒k=−6