Question

whats the vertex of -x^2-7x-12

Answer 1

vertex of the parabola is either the max. or min. value of the parabola.

you need to first find the axis of symmetry: x = -x/2a
after finding that x value, plug it back into the equation -x^2-7x-12.

Answer 2

sorry correction:
axis of symmetry = \(\large \frac{-b}{2a}\)

Answer 3

Hi again ^_^

Do you know the formula of finding the vertex of a quadratic equation?
Let's start with the general Quadratic Equation: Ax^2 + Bx +C=0
Now let's look at your Equation: -x^2-7x-12
So this means that your A= -1, B = -7 and C= -12

Follow what calculuxy posted, that is the formula for the vertex :)

Answer 4

therefore evaluate:
\(\large \frac{-(-7)}{2(-1)}\) and you should get the axis of symmetry