Question

if X + 1 is the factor of 2 X square + kx-1 find the the of k

answer 4th question ​

Answer 1

Step-by-step explanation:

its yur solution dear....

Answer 2

* Question *

→ if X + 1 is the factor of 2 X square + kx-1 find the the of k.

$\rule{300}2$

$\rightarrow x+1=0 \\ \rightarrow x=-1$

◇ Putting x= -1 【 in the given polynomial 】

To find,

value of k =?

$\rule{300}2$

★ Solution ★

$\rightarrow 2x^{2}+kx-1 \\ \rightarrow2×(-1)^{2}+k(-1)-1 \\ \rightarrow 2-k-1 \\ \rightarrow k= -2+1 \\ \rightarrow k=-1$

* Hence *

$\rule{150}2$

$\large{\fbox{\fbox{k=-1}}}$

$\rule{300}2$