document.write( "Question 147432: Solve using the quadratic formula:
\n" ); document.write( "x2 – 7x – 1 = -7
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Algebra.Com's Answer #107802 by oscargut(2103) $\"\"$ $\"About$

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x2 – 7x – 1 = -7
\n" ); document.write( "x^2-7x+6=0
\n" ); document.write( " $\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"$ =
\n" ); document.write( " $\"x+=+%287+%2B-+sqrt%28+49-4%2A1%2A6+%29%29%2F%282%29+\"$ =
\n" ); document.write( " $\"x+=+%287+%2B-+sqrt%2825%29%29%2F%282%29+\"$ =
\n" ); document.write( " $\"x+=+%287+%2B-+5%29%2F%282%29+\"$ \r
\n" ); document.write( "\n" ); document.write( "so x=6 or x= 1\r
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