Question

Which equation is y = 9x2 + 9x – 1 rewritten in vertex form?

Answer 1

The requires Completing the Square. Go...

y = 9(x^2 + x + _____) - 1 - 9(_____)

With what shall we fill in the blank?

Answer 2

i dont know thats why i asked lol

Answer 3

Not a good answer. You should not have been given this problem without SOME background in Completing the Square.

Utilize this principle: \((a+b)^{2} = a^{2} + 2ab + b^{2}\)

Look really hard at that middle term. How can we get the third term out of it?