Question

Identify the vertex for the graph of y = 3x^2 + 12x + 5.

(2, 41)

(2, 35)

(-2, -31)

(-2, -7)

Answer 1

use -b/2a to find x
then put the value of x in equation and find y

Answer 2

b=12
a=3

Answer 3

so its -12/2(3) =-12/6 =-2

Answer 4

x=-2
now y will be
3(-2)^2+12(-2)+5

Answer 5

which is
12-24+5 =-7

Answer 6

so answer is (-2,-7) :)