document.write( "Question 36751: solve using the quadratic formula
\n" ); document.write( " $\"x%5E2-4x-7=0\"$ \n" ); document.write( "

Algebra.Com's Answer #22564 by Cintchr(481) $\"\"$ $\"About$

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$\"+x%5E2-4x-7=0+\"$
\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
\n" ); document.write( "b=-4
\n" ); document.write( "c=-7
\n" ); document.write( " $\"+x+=+%28-%28-4%29+%2B-+sqrt%28+%28-4%29%5E2-4%2A1%2A-7+%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+sqrt%28%28-4%29%5E2-4%2A1%2A-7+%29%29%2F%28%282%2A1%29%29+\"$
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+sqrt%28%2816-4%2A1%2A-7+%29%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+sqrt%28%2816%2B28+%29%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+sqrt%28%2844+%29%29%29%2F%282%2A1%29+\"$
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+sqrt%28%2844+%29%29%29%2F%282%29+\"$
\n" ); document.write( "root out 44
\n" ); document.write( " $\"+x+=+%28%284%29+%2B-+2sqrt%28%2811+%29%29%29%2F%282%29+\"$
\n" ); document.write( "Reduce the fraction
\n" ); document.write( " $\"+x+=+%282%29+%2B-+sqrt%28%2811+%29%29+\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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