From what value of k , -4 is Zeroes of the polynomial x²-x-(2k+2) – InterviewSolution

1.

From what value of k , -4 is Zeroes of the polynomial x²-x-(2k+2)

Answer»

Answer:

K = 9

Step-by-step explanation:

f(x) = x² - x - (2k +2)

f(-4) = (-4)² -(-4) - (2k + 2)

0 = 16 + 4 - 2k - 2

0 = 18 - 2k

2k = 18

k = 18 ÷ 2

∴ k = 9

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