Question

If x+1 is a factor of the polynomial 2x square + kx +1 , then the value of 'k' is

Answer 1

x + 1 is a factor of the polynomial 2x² + kx + 1

then

x + 1 = 0

x = -1

substituting x = -1 in 2x² + kx + 1, it satisfies the polynomial's value to zero

2(-1)² + k(-1) + 1 = 0

2(1) - k + 1 = 0

k = 3

Answer 2

Answer:

k=3

Step-by-step explanation:

2x² +kx +1 =(x+1)(2x+1)

kx =3x

k=3