document.write( "Question 1058804: Determine the quadratic function that has zeros at -3 and -5 if f(7)= -720. \n" ); document.write( "

Algebra.Com's Answer #673906 by Boreal(15235) $\"\"$ $\"About$

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(x+3)(x+5) are factors
\n" ); document.write( "a(x^2+8x+15)=0
\n" ); document.write( "When x=7
\n" ); document.write( "a(49+56+15)=-720
\n" ); document.write( "a(120)=-720
\n" ); document.write( "a=-6
\n" ); document.write( "f(x)=-6x^2-48x-90
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