Question

If -4 is a zero of the polynomial x2 - x - (2k + 2) then find the value of k.

Answer 1

Answer:

k=8

put

x=-4

then

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

-8-8k-8=0

-8k=0

k=+8ans

Answer 2

Step-by-step explanation:

p(x) = x² - x - (2k + 2)

-4 is the zero of p(x)

out x = -4

p(-4) = (-4)² - (-4) - (2k + 2)

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

20 - 2k - 2 = 0

18 - 2k = 0

18 = 2k

18/2 = k

9 = k