document.write( "Question 548975: solve the equation by completeing the square:\r
\n" ); document.write( "\n" ); document.write( "7x^2+10x=-2 \n" ); document.write( "

Algebra.Com's Answer #357383 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+7x%5E2+%2B+10x+=+-2+\"$
\n" ); document.write( "Divide both sides by $\"7\"$
\n" ); document.write( " $\"+x%5E2+%2B+%2810%2F7%29%2Ax+=+-2%2F7+\"$
\n" ); document.write( "Take 1/2 of the coefficient of $\"x\"$ ,
\n" ); document.write( "square it, and add it to both sides
\n" ); document.write( " $\"+x%5E2+%2B+%2810%2F7%29%2Ax+%2B+%285%2F7%29%5E2+=+-2%2F7+%2B+%285%2F7%29%5E2+\"$
\n" ); document.write( " $\"+x%5E2+%2B+%2810%2F7%29%2Ax+%2B+%285%2F7%29%5E2+=+-14%2F49+%2B+25%2F49+\"$
\n" ); document.write( " $\"+x%5E2+%2B+%2810%2F7%29%2Ax+%2B+%285%2F7%29%5E2+=+11%2F49+\"$
\n" ); document.write( " $\"+%28+x+%2B+%285%2F7%29+%29%5E2+=+11%2F49+\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+x+%2B+5%2F7+=+sqrt%2811%29%2F7+\"$
\n" ); document.write( " $\"+x+=+%28+-5+%2B-+sqrt%2811%29+%29+%2F+7+\"$
\n" ); document.write( "Here's a plot of equation:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-3%2C+3%2C+-3%2C+7%2C+7x%5E2+%2B+10x+%2B+2+%29+\"$ \n" ); document.write( "

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