Question

-4 is the zero of the polynomial f (x) = x pawer 2 - x - (2k + 2), then the value of k is

Answer 1

Answer:

given f(x) = x² - x - (2k+2) = 0

given that -4 is the zero of the polynomial

substituting -4 in the above equation

(-4)² - (-4) - (2k+2) = 0

16 + 4 - 2k - 2 = 0 (- * + = -, - * - = +)

2k = 18

k = 18/2

k = 9