SOLUTION: Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720.

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Question 1058804: Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
(x+3)(x+5) are factors
a(x^2+8x+15)=0
When x=7
a(49+56+15)=-720
a(120)=-720
a=-6
f(x)=-6x^2-48x-90
graph%28300%2C300%2C-10%2C10%2C-800%2C10%2C-6x%5E2-48x-90%29
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C-6x%5E2-48x-90%29