document.write( "Question 655421: Find f(3) when f(x)=x^2-4x+7 \n" ); document.write( "

Algebra.Com's Answer #409100 by nerdybill(7384) $\"\"$ $\"About$

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Find f(3) when f(x)=x^2-4x+7
\n" ); document.write( ".
\n" ); document.write( "just substitute the x with a 3:
\n" ); document.write( "f(x)=x^2-4x+7
\n" ); document.write( "f(3)=3^2-4(3)+7
\n" ); document.write( "f(3)=9-4(3)+7
\n" ); document.write( "f(3)=9-12+7
\n" ); document.write( "f(3)=-3+7
\n" ); document.write( "f(3)=4 \n" ); document.write( "

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