document.write( "Question 911737: Can you help me solve this equation 2x^2+8x-7=-2 by completing the square? I got this x+4=+or- square root of 7/2.
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Algebra.Com's Answer #553308 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+2x%5E2+%2B+8x+-+7+=+-2+\"$
\n" ); document.write( " $\"+2x%5E2+%2B+8x+=+5+\"$
\n" ); document.write( " $\"+x%5E2+%2B+%288%2F2%29%2Ax+=+5%2F2+\"$
\n" ); document.write( "Take $\"+1%2F2+\"$ of the coefficient
\n" ); document.write( "of the x term, square it and add
\n" ); document.write( "it to both sides
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\n" ); document.write( " $\"+x%5E2+%2B+4x+%2B+%284%2F2%29%5E2+=+5%2F2+%2B+%28+4%2F2%29%5E2+\"$
\n" ); document.write( " $\"+x%5E2+%2B+4x+%2B+4+=+5%2F2+%2B+8%2F2+\"$
\n" ); document.write( " $\"+x%5E2+%2B+4x+%2B+4+=+13%2F2+\"$
\n" ); document.write( " $\"+%28+x+%2B+2+%29%5E2+=+13%2F2+\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+x+%2B+2+=+sqrt%28+13%2F2+%29+\"$
\n" ); document.write( " $\"+x+=+%28+-4+%2B+sqrt%2813%29+%29+%2F+2+\"$
\n" ); document.write( "and also:
\n" ); document.write( " $\"+x+=+%28+-4+-+sqrt%2813%29+%29+%2F+2+\"$
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\n" ); document.write( "Check my math carefully
\n" ); document.write( "Plug either answer back into the
\n" ); document.write( "original equation and solve\r
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