Question

Identify the vertex for the graph of y = 3x2 + 12x + 5.

(2, 41)

(2, 35)

(−2, −31)

(−2, −7)

Answer 1

use \(x=-\frac{b}{2a}=-\frac{12}{2\times 3}=-2\) for the first coordinate
second coordinate is what you get when you replace \(x\) by \(-2\)

Answer 2

I graphed the equation, so I got -2, -7 as the vertex.
D is your answer. :)

Answer 3

thank you

Answer 4

You're welcome. :)