document.write( "Question 607929: Solve by factoring and using the principle of zero products:
\n" ); document.write( " x^2+4x-21=0\r
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Algebra.Com's Answer #382998 by lynnlo(4176)\"\" \"About 
You can put this solution on YOUR website!
x=-7,3 \n" ); document.write( "
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