document.write( "Question 156824: for what values of p is 4x^2+px+49=0 a perfect square? \n" ); document.write( "
Algebra.Com's Answer #115686 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
4x^2+px+49=0
\n" ); document.write( "p=+/-28
\n" ); document.write( "(4x^2+/-28x+49)=0
\n" ); document.write( "Proof:
\n" ); document.write( "2x+7
\n" ); document.write( "2x+7
\n" ); document.write( "---------------
\n" ); document.write( "4x^2+14x+14x+49=4x^2+28x+49
\n" ); document.write( "2x-7
\n" ); document.write( "2x-7
\n" ); document.write( "------------------
\n" ); document.write( "4x^2-14x-14x+49=4x^2-28x+49
\n" ); document.write( "
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