For what value of k, the number -4 is a zero of the polynomial x^2-x-(2k+2). Also find the other zero.
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substitute x = - 4, we get 16 + 4 - (2k +2) = 0
20 = 2k + 2, so k = 9
other zero is x = 5
20 = 2k + 2, so k = 9
other zero is x = 5
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