Question

3. If +1 is a factor of the polynomial 22+, then the value of k is

a) -3 b) 4 c) 2 d) -2

Answer 1

$\huge\sf{\underline{\underline{\green{Answer}}}}$

Option (a) is correct

Answer 2

Answer:

c) Let p(x) = 2x2 + kx

Since, (x + 1) is a factor of p(x), then

p(-1)=0

2(-1)2 + k(-1) = 0

⇒ 2-k = 0 ⇒ k= 2

Hence, the value of k is 2.