document.write( "Question 609378: x(squared)-4x=-3 Solve for x PLEASE \n" ); document.write( "

Algebra.Com's Answer #383694 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+x%5E2+-+4x+=+-3+\"$
\n" ); document.write( "You can complete the square
\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( " $\"+x%5E2+-+4x+%2B+%28-4%2F2%29%5E2+=+-3+%2B+%28-4%2F2%29%5E2+\"$
\n" ); document.write( " $\"+x%5E2+-+4x+%2B+4+=+-3+%2B+4+\"$
\n" ); document.write( " $\"+%28+x+-+2+%29%5E2+=+1+\"$
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( " $\"+x-2+=+1+\"$
\n" ); document.write( " $\"+x+=+3+\"$
\n" ); document.write( "and, also
\n" ); document.write( " $\"+x-2+=+-1+\"$
\n" ); document.write( " $\"+x+=+1+\"$
\n" ); document.write( "---------
\n" ); document.write( "Check by plugging the answers back into equation
\n" ); document.write( " $\"+x%5E2+-+4x+=+-3+\"$
\n" ); document.write( " $\"+3%5E2+-+4%2A3+=+-3+\"$
\n" ); document.write( " $\"+9+-+12+=+-3+\"$
\n" ); document.write( " $\"+-3+=+-3+\"$
\n" ); document.write( "and
\n" ); document.write( " $\"+x%5E2+-+4x+=+-3+\"$
\n" ); document.write( " $\"+1%5E2+-+4%2A1+=+-3+\"$
\n" ); document.write( " $\"+1+-4+=+-3+\"$
\n" ); document.write( " $\"+-3+=+-3+\"$
\n" ); document.write( "OK \n" ); document.write( "

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