SOLUTION: Determine the quadratic equation for the parabola: maximum value: 9; zeros of f: -6 and 0

Question 749162: Determine the quadratic equation for the parabola:
maximum value: 9; zeros of f: -6 and 0

Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Since you have a maximum value, your variable, 'a', is negative. Use standard form.

but you would use the zeros to help find the value for 'a'. Right in the middle of -6 and 0 is -3, which is why you have (x+3) as part of the standard form. Vertex is (-3,9).

The zeros give two more equations which may help in finding 'a'.
(-6,0) gives us
(0,0) gives us .
What can you do with that? Can YOU finish this?
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