Question

for value of k (-4) is a zero of the polynomial x2- x -(2k+2)

Answer 1

for -4 to be zero of the given polynomial,the polynomial should be zero on putting -4 in it.

x^2-x-(2k+2)
(-4)^2-(-4)-(2k+2)=0
16+4-2k-2=0
2k=18
k=9
done.
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Answer 2

hope it helps you
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