Answer:
p(x) = x² - x - (2a + 2)
If -4a is a zero of the polynomial then p(x) = 0
0 = (-4a)² - (-4a) - (2a + 2)
0 = 16a² + 4a - 2a - 2
0 = 16a² + 2a - 2
0 = 2(8a² + a - 1)
8a² + a - 1 = 0
Explanation
I think thats right s aw learned it on here like that for sure so credits to shivashailashriivv hope its helpful!