document.write( "Question 109252This question is from textbook
\n" ); document.write( ": 6.Please help me solve using the quadratic formula:
\n" ); document.write( "x2 – 7x – 1 = -7
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Algebra.Com's Answer #79681 by edjones(8007)\"\" \"About 
You can put this solution on YOUR website!
x2 – 7x – 1 = -7
\n" ); document.write( "x^2-7x+6=0
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Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)
Quadratic equation \"ax%5E2%2Bbx%2Bc=0\" (in our case \"1x%5E2%2B-7x%2B6+=+0\") has the following solutons:
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\n" ); document.write( " \"x%5B12%5D+=+%28b%2B-sqrt%28+b%5E2-4ac+%29%29%2F2%5Ca\"
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\n" ); document.write( " For these solutions to exist, the discriminant \"b%5E2-4ac\" should not be a negative number.
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\n" ); document.write( " First, we need to compute the discriminant \"b%5E2-4ac\": \"b%5E2-4ac=%28-7%29%5E2-4%2A1%2A6=25\".
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\n" ); document.write( " Discriminant d=25 is greater than zero. That means that there are two solutions: \"+x%5B12%5D+=+%28--7%2B-sqrt%28+25+%29%29%2F2%5Ca\".
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\n" ); document.write( " \"x%5B1%5D+=+%28-%28-7%29%2Bsqrt%28+25+%29%29%2F2%5C1+=+6\"
\n" ); document.write( " \"x%5B2%5D+=+%28-%28-7%29-sqrt%28+25+%29%29%2F2%5C1+=+1\"
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\n" ); document.write( " Quadratic expression \"1x%5E2%2B-7x%2B6\" can be factored:
\n" ); document.write( " \"1x%5E2%2B-7x%2B6+=+%28x-6%29%2A%28x-1%29\"
\n" ); document.write( " Again, the answer is: 6, 1.\n" ); document.write( "Here's your graph:
\n" ); document.write( "\"graph%28+500%2C+500%2C+-10%2C+10%2C+-20%2C+20%2C+1%2Ax%5E2%2B-7%2Ax%2B6+%29\"

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