Question

Find the vertex of the graph of the following quadratic equations y= -3x^2 -12x-13

Answer 1

by using the rule -b/2a —> 12/-6= -2

Answer 2

Explanation:

The vertex is a point. The x value is defined as x = - b / 2a where

a = -3

b = - 12

x = - -12/ 2* -3

x = 12 / - 6

x = -2

what is y when x = - 2?

y = -3(-2)^2 - 12(-2) - 13

y = -12 + 24 - 13

y = -1

Does the graph agree? It should

The equation is written as

y = -3(x + 2)^2 - 1