document.write( "Question 329265: Solve 2x^2-2x-1=0 by any method. \n" ); document.write( "

Algebra.Com's Answer #235985 by checkley77(12844) $\"\"$ $\"About$

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2x^2-2x-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=(2+-sqrt[-2^2-4*2*-1])/2*2
\n" ); document.write( "x=(2+-sqrt[4+8)/4
\n" ); document.write( "x=(2+-sqrt12)/4
\n" ); document.write( "x=(2+-3.4641)/4
\n" ); document.write( "x=5.4541/4
\n" ); document.write( "x=1.366 ans.
\n" ); document.write( "x=(2-3.4641)/4
\n" ); document.write( "x=-1.4641/4
\n" ); document.write( "x=-0.366 ans.
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