Question

if x +1 is a factor polynomial
${2x}^{2}$
+kx then the value of k is​

Answer 1

Answer:

$x + 1 = 0$

$x = - 1$

$2 {x}^{2} + kx$

$2( - 1)2 + k( - 1)$

2(-1)²-k

2-k=0

k=2 is the answer of this

Answer 2

Answer : 3

Solution :

Given that :

$(x + 1$)    is a factor of polynomial  $2x^2 + kx + 1$

then   ,$x + 1 = 0 => x = -1$

So, if the x + 1 is a factor of given polynomial then the value of given polynomial will be zero at the point   $x = -1$

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

=> $2-k+1 = 0$

=> $3-k = 0$

=> $k = 3$

So, the value of k will be 3

hope it helps

:)