document.write( "Question 312236: Solve by using any method. \r
\n" ); document.write( "\n" ); document.write( "\"+x%5E2+-+4x+=+1+\" \n" ); document.write( "
Algebra.Com's Answer #223233 by checkley77(12844)\"\" \"About 
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x^2 - 4x = 1
\n" ); document.write( "x^2-4x-1=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=(4+-sqrt[-4^2-4*1*-1])/2*1
\n" ); document.write( "x=(4+-sqrt[16+4])/2
\n" ); document.write( "x=(4+-sqrt20)/2
\n" ); document.write( "x=(4+-4.472)/2
\n" ); document.write( "x=(4+4.472)/2
\n" ); document.write( "x=8.472)/2
\n" ); document.write( "x=4.236 ans.
\n" ); document.write( "x=(4-4.472)/2
\n" ); document.write( "x=-.472/2
\n" ); document.write( "x=-.236 ans.
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