document.write( "Question 697148: solve by completing the square:\r
\n" ); document.write( "\n" ); document.write( " $\"x%5E2-4x%2B10=0\"$ \r
\n" ); document.write( "\n" ); document.write( "My work:\r
\n" ); document.write( "\n" ); document.write( " $\"x%5E2-4x=-10\"$ then do half of four which is 2, then do 2times 2 and get 4.
\n" ); document.write( " $\"X%5E2-4x%2B4=-10%2B4\"$
\n" ); document.write( " $\"X%5E2-4x%2B4=-6\"$
\n" ); document.write( "(x-2)(x-2)=-6
\n" ); document.write( "(x-2)=plus or mine $\"sqrt%286%29\"$
\n" ); document.write( "x=2 plus or minus $\"sqrt%286%29\"$ \n" ); document.write( "

Algebra.Com's Answer #429691 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
solve by completing the square:\r
\n" ); document.write( "\n" ); document.write( " $\"x%5E2-4x%2B10=0\"$ \r
\n" ); document.write( "\n" ); document.write( "My work:\r
\n" ); document.write( "\n" ); document.write( " $\"x%5E2-4x=-10\"$ then do half of four which is 2, then do 2times 2 and get 4.
\n" ); document.write( " $\"X%5E2-4x%2B4=-10%2B4\"$
\n" ); document.write( " $\"X%5E2-4x%2B4=-6\"$
\n" ); document.write( "(x-2)(x-2)=-6
\n" ); document.write( " $\"x-2+=+sqrt%28-6%29\"$
\n" ); document.write( " $\"x+=+2+%2B+i%2Asqrt%286%29\"$
\n" ); document.write( " $\"x+=+2+-+i%2Asqrt%286%29\"$
\n" ); document.write( "----
\n" ); document.write( "i = sqrt(-1)
\n" ); document.write( "=========================
\n" ); document.write( "(x-2)=plus or mine $\"sqrt%286%29\"$
\n" ); document.write( "x=2 plus or minus $\"sqrt%286%29\"$ ***** correct except for the i \n" ); document.write( "

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