If x + 1 is a factor if the polynomial 2x2 + kx, then k = A. -2 B. – InterviewSolution

InterviewSolution

1.

If x + 1 is a factor if the polynomial 2x2 + kx, then k = A. -2 B. -3 C. 4 D. 2

Answer»

Let, f (x) = 2x² + kx

Since, x + 1 is divided by f (x)

so,

f (-1) =0

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

k = 2

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