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

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720.      Log On


   

Question 1058798: Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720.
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f(x) = a(x+3)(x+5)
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Solve for "a"::
-720 = a(7+3)(7+5)
a = -720/(120)
a = -6
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Ans: f(x) = -6(x+3)(x+5)
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Cheers,
Stan H.
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