document.write( "Question 199551: p2-4p=21 \n" ); document.write( "
Algebra.Com's Answer #149952 by edjones(8007)\"\" \"About 
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p^2-4p=21
\n" ); document.write( "p^2-4p-21=0
\n" ); document.write( "(p-7)(p+3)=0
\n" ); document.write( "p=7, p=-3
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