For what value of a is - 4a zero of the polynomial p(x) = x ^ 2 - x - (2a + 2) ^ 2​

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!

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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