Question

if X + 1 is a factor of polynomial 2x square + x k then the value of k is a) -3 B) 4​

Answer 1

Step-by-step explanation:

if x+1=0.

then x=-1.

substitute x=-1 in the given equation....

so, 2(-1)^2+(-1)k =0.

2(1)-k =0.

2-k =0

-k = -2.

minus on both sides will get cancelled...

so,k= 2...

Answer 2

Answer:

Hello Dear User__________

Here is Your Answer...!!

____________________

Step-by-step explanation:

$Given \ p(x)=2x^{2}+kx\\\\and \ x+1 \ is \ a \ factor \ of \ p(x)\\\\x+1=0\\\\\\x=-1\\\\putting \ x=-1 \ in \ p(x)\\\\2x^{2}+kx=0\\\\2(-1)^{2}+(-1)k=0\\ \\2*1-k=0\\\\k=2$

Hope it is clear to you.