Question

Find the value of k if x+1 is a factor of 2x²- x- k.​

Answer 1

Answer:

k = 3

Step-by-step explanation:

If x + 1 is a factor of the given equation then x = -1 will satisfy the equation.

$2 {x}^{2} - x - k = 0$

$2 {( - 1)}^{2} - ( - 1) - k = 0$

$2 + 1 - k = 0$

$k = 3$

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Answer 2

X+1=0

X=-1

Substituting the value of x in the equation

2(-1)²-(-1)-k=0

2+1-k=0

3-k=0

-K=-3

K=3