Question

For what value of k, (-4) is a zero of the polynomial x2 - x - (2k + 2)?​

Answer 1

Answer:

x = -4

0 = x² - x - (2k + 2)

0 = (-4)² + 4 -( 2k + 2)

0 = 16 +4 - (k+2)

0 = 20 - k - 2

0 = 18 - k

k = 18