document.write( "Question 607524: Please help.me .solve this equation . x² -2x -13 = 0 \n" ); document.write( "

Algebra.Com's Answer #382763 by alicealc(293) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"x%5E2-2x-13=0\"$
\n" ); document.write( "Because we can't factorize this, use the formula:
\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$
\n" ); document.write( "a = 1, b = -2, c = -13
\n" ); document.write( " $\"x+=+%28-%28-2%29+%2B-+sqrt%28+%28-2%29%5E2-4%2A1%2A%28-13%29+%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"x+=+%282+%2B-+sqrt%28+4%2B52+%29%29%2F2+\"$
\n" ); document.write( " $\"x+=+%282+%2B-+sqrt%28+56+%29%29%2F2+\"$
\n" ); document.write( " $\"x+=+%282+%2B-+sqrt%28+4%2A14+%29%29%2F2+\"$
\n" ); document.write( " $\"x+=+%282+%2B-+2sqrt%28+14+%29%29%2F2+\"$
\n" ); document.write( " $\"x+=+1+%2B-+sqrt%28+14+%29+\"$
\n" ); document.write( " $\"x+=+1+%2B+sqrt%28+14+%29+\"$ or $\"x+=+1+-+sqrt%28+14+%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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