Algebrahard · Past Paper

Find the value of k if x + 2 is a factor of 2x^3 + 5x^2 + kx + 10.

A-7
B7
C5
D-5

✓ Correct Answer: B7

P(-2) = 0: 2(-8) + 5(4) - 2k + 10 = -16 + 20 - 2k + 10 = 14 - 2k = 0, so k = 7.

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