document.write( "Question 401079: x^2-18x-4=0 \n" ); document.write( "

Algebra.Com's Answer #283991 by jsmallt9(3758) $\"\"$ $\"About$

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This equation will not factor so we must use the Quadratic Formula (or complete the square):
\n" ); document.write( " $\"x+=+%28-%28-18%29+%2B-+sqrt%28%28-18%29%5E2+-+4%281%29%28-4%29%29%29%2F2%281%29\"$
\n" ); document.write( "which simplifies as follows:
\n" ); document.write( " $\"x+=+%28-%28-18%29+%2B-+sqrt%28324+-+4%281%29%28-4%29%29%29%2F2%281%29\"$
\n" ); document.write( " $\"x+=+%28-%28-18%29+%2B-+sqrt%28324+%2B+16%29%29%2F2%281%29\"$
\n" ); document.write( " $\"x+=+%28-%28-18%29+%2B-+sqrt%28340%29%29%2F2%281%29\"$
\n" ); document.write( " $\"x+=+%2818+%2B-+sqrt%28340%29%29%2F2\"$
\n" ); document.write( " $\"x+=+%2818+%2B-+sqrt%284%2A85%29%29%2F2\"$
\n" ); document.write( " $\"x+=+%2818+%2B-+sqrt%284%29%2Asqrt%2885%29%29%2F2\"$
\n" ); document.write( " $\"x+=+%2818+%2B-+2%2Asqrt%2885%29%29%2F2\"$
\n" ); document.write( " $\"x+=+%282%289+%2B-+sqrt%2885%29%29%29%2F2\"$
\n" ); document.write( " $\"x+=+%28cross%282%29%289+%2B-+sqrt%2885%29%29%29%2Fcross%282%29\"$
\n" ); document.write( " $\"x+=+9+%2B-+sqrt%2885%29\"$
\n" ); document.write( "In long form this is:
\n" ); document.write( " $\"x+=+9+%2B+sqrt%2885%29\"$ or $\"x+=+9+-+sqrt%2885%29\"$ \n" ); document.write( "

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