Question

if x-2 is a factor of p (x) = x^2+2Kx+8, then K is ?​

Answer 1

Answer:

Step-by-step explanation:

Let the function be represented by f(x).

As x+2, exactly divides f(x),  

−2 is a zero of f(x), hence f(−2)=0

f(x)=2x  

3

+5x  

2

−x−k

f(−2)=2(−2  

3

)+5(−2  

2

)+2−k=0

⇒0=−16+20+2−k

⇒k=6

Hope it helps you