document.write( "Question 302203: solve the following equation using the quadratic formula
\n" ); document.write( "2x2-7x-1=0
\n" ); document.write( "the solution set is?
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Algebra.Com's Answer #216718 by london maths tutor(243)\"\" \"About 
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2x^2-7x-1=0 \r
\n" ); document.write( "\n" ); document.write( "Using quadratic formulas: \"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"\r
\n" ); document.write( "\n" ); document.write( "where a = 2, b = -7 and c = -1 \r
\n" ); document.write( "\n" ); document.write( "\"x+=+%28-%28-7%29+%2B-+sqrt%28+%28-7%29%5E2-4%2A2%2A%28-1%29+%29%29%2F%282%2A%282%29%29+\"
\n" ); document.write( "\"x+=+%287%29+%2B-+sqrt%28+%2849-%28-8%29+%29%2F4%29+\"
\n" ); document.write( "\"x+=+%287%29+%2B-+sqrt%28+%2849%2B8%29+%29%2F4%29+\"
\n" ); document.write( "\"x+=+%287%29+%2B-+sqrt%28+%2857%29+%29%2F4%29+\"\r
\n" ); document.write( "\n" ); document.write( "x = 5.11 or x = 8.89
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