document.write( "Question 853050: f(x)=81-x^2 \n" ); document.write( "
\n" ); document.write( "Hi,\n" ); document.write( "f(x)=81-x^2\n" ); document.write( "f(x)=(9 - x)(9 + x)\n" ); document.write( "Use FOIL to check factoring\n" ); document.write( "F First terms\n" ); document.write( "O Outside terms\n" ); document.write( "I Inside terms\n" ); document.write( "L Last terms\n" ); document.write( "