document.write( "Question 988344: 3x^2+3x=21 solve by completing the square, show work pls \n" ); document.write( "

Algebra.Com's Answer #608896 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"3x%5E2%2B3x=21\"$
\n" ); document.write( " $\"3x%5E2%2B3x-21=0\"$
\n" ); document.write( " $\"3%28x%5E2%2Bx-7%29=0\"$
\n" ); document.write( " $\"x%5E2%2Bx-7=0\"$
\n" ); document.write( " $\"x%5E2%2Bx%2B%281%2F2%29%5E2-7=%281%2F2%29%5E2\"$
\n" ); document.write( " $\"%28x%5E2%2Bx%2B1%2F4%29=1%2F4%2B7\"$
\n" ); document.write( " $\"%28x%2B1%2F2%29%5E2=1%2F4%2B28%2F4\"$
\n" ); document.write( " $\"%28x%2B1%2F2%29%5E2=29%2F4\"$
\n" ); document.write( " $\"x%2B1%2F2=0+%2B-+sqrt%2829%29%2F4\"$
\n" ); document.write( " $\"x=-1%2F2+%2B-+sqrt%2829%29%2F4\"$
\n" ); document.write( " \n" ); document.write( "

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