Question

If x+1 is a factor of the polynomial 2x²+kx then the value of k is
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Answer 1

Answer:

2

Step-by-step explanation:

x+1=0

therefore, x= -1

2(-1)²+ k(-1)=0

2-k=0

therefore, k=2

Answer 2

Step-by-step explanation:

$x + 1 = 0$

$x = - 1$

putting value in p(x)

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

$2(1) - k = 0$

$2 - k = 0$

$- k = - 2$

$k = 2 \: \: answer$