document.write( "Question 50800: show that the function is a quadratic function by writting it in the quadratic form and identify a, b, and c, f(x)= (x+7)(x+5) \n" ); document.write( "

Algebra.Com's Answer #33824 by Earlsdon(6294) $\"\"$ $\"About$

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$\"f%28x%29+=+%28x%2B7%29%28x%2B5%29\"$ Multiply the two factors using FOIL.
\n" ); document.write( " $\"f%28x%29+=+x%5E2%2B5x%2B7x%2B35\"$ Simplify.
\n" ); document.write( " $\"f%28x%29+=+x%5E2%2B12x%2B35\"$ Now compare with the general/standard form of the quadratic equation:
\n" ); document.write( " $\"f%28x%29+=+ax%5E2%2Bbx%2Bc\"$ You can easily identify:
\n" ); document.write( " $\"a+=+1\"$
\n" ); document.write( " $\"b+=+12\"$
\n" ); document.write( " $\"c+=+35\"$ \n" ); document.write( "

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