Question

For what value of k, -4 is a zero of the polynomial xsq-x-(2k-2)

Answer 1

p(x) = x² - x - 2k +2 = 0
p(-4) = (-4)² - (-4) -2k +2 =0
=16+4-2k+2 =0
=22-2k=0
2k=22
k=22/2
k=11