Question

Identify the vertex for the graph of y = -3x2 - 6x + 4.

Answer 1

this is for a study guide and it is a multiple chocie question, the answer choices are (1,13) (-1,13) (1,7) or (-1,7)

Answer 2

my bad
one min

Answer 3

okay :)

Answer 4

Hi gatorgalvet :)

make right side of the question as a perfect square.

Answer 5

\[y=-3[x^2+2x-\frac{4}{3}]\]\[y=-3[(x+1)^2-1-\frac{4}{3}]\]\[y=-3[(x+1)^2-\frac{7}{3}]\]\[y=-3(x+1)^2+7\]
so vertex is (-1,7)
i messed up witht he negatives

Answer 6

\(\large \frac{-b}{2a}\)!

Answer 7

okay thx zepp, shay, and lalaly!

Answer 8

\(\huge \frac{-(-6)}{2(-3)}=\frac{6}{-6}=-1\) That's x, then plug it in the equation to find y, and you'll find what @lalaly got :]