Question

Which of the following is the vertex form of the expression below?

y = 9x2 - 90x + 231

Answer 1

try to rewrite it into the form
y=a(x-h)^2-k

Answer 2

in other words, complete the square, factor out x's coefficient, and you should have your result if you did it correctly.

Answer 3

inkyvoyd is correct. If you put it into the form he/she has listed, it will be in vertex form

Answer 4

y = 9(x-5))^2 + 6

Answer 5

You're right ! did what u suggested an and i was correc ! thanx so much !! :)

Answer 6

Also, the point (h,k) is the vertex when you write it in vertex form. Remember that it's *a(x-h)* and not *a(x+h)*