SOLUTION: y=-3x^2-9x-12 need help finding the vertex and axis

SOLUTION: y=-3x^2-9x-12 need help finding the vertex and axis

Algebra.Com

Question 709270: y=-3x^2-9x-12 need help finding the vertex and axis
Answer by josgarithmetic(39838) (Show Source): You can put this solution on YOUR website!
EDIT: Fixed the sign mistake.

First, factor. Then complete the square.

The square to add and subtract is .

The value of "h" is and the value of "k" is or .
The vertex is (,)

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