document.write( "Question 339262: please solve using the principle of zero products.
\n" ); document.write( "2x^2+x=42+9x \n" ); document.write( "

Algebra.Com's Answer #243161 by nerdybill(7384) $\"\"$ $\"About$

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2x^2+x=42+9x
\n" ); document.write( "moving all the terms to the left:
\n" ); document.write( "2x^2-8x=42
\n" ); document.write( "2x^2-8x-42=0
\n" ); document.write( "dividing both sides by 2:
\n" ); document.write( "x^2-4x-21=0
\n" ); document.write( "factoring:
\n" ); document.write( "(x-7)(x+3) = 0
\n" ); document.write( ".
\n" ); document.write( "x = {-3, 7} \n" ); document.write( "

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