Question

Write y = –4x2 – 64x – 265 in vertex form.

Answer 1

I will do it and you tell me what shape it is, okay ?

Answer 2

Can you do a vertex form in a circle, @SolomonZelman I've been wondering.

Answer 3

Okay

Answer 4

This won't be a circle, Jesstho

Answer 5

\(\normalsize\color{blue}{ y=-4x^2-64x-265 }\)
\(\normalsize\color{blue}{ y=-4x^2-16x+256-256-265 }\)
\(\normalsize\color{blue}{ y=-4(x^2-16x+64)-256-265 }\)
\(\normalsize\color{blue}{ y=-4(x^2-16x+64)-521 }\)
\(\normalsize\color{red}{ y=-4(x-8)^2-521 }\)

Answer 6

What is it, what do you think ?

Answer 7

What is it, what do you think ?

Answer 8

I would say a square.

Answer 9

No

Answer 10

\(\normalsize\color{green}{ y=a( \rm {{x}} - h) ^2+k }\) dowsn't remind you anything ?

Answer 11

wait wait, i know thats something about parbolas

Answer 12

Yes, this is opening down parabola.

Answer 13

sorry im exhausted ive been cramming the past week and im fried xD

Answer 14

i dont think its -521 tho

Answer 15

@SolomonZelman