document.write( "Question 931112: Can you help me here? If the square root of twice a certain number is subtracted from the number the result is 4. Find the number. \n" ); document.write( "

Algebra.Com's Answer #565443 by mananth(16946) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "sqrt of twice a number= $\"sqrt%282x%29\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x-+sqrt%282x%29=4\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"x-4=+sqrt%282x%29\"$ \r
\n" ); document.write( "\n" ); document.write( "square on both sides\r
\n" ); document.write( "\n" ); document.write( "(x-4)^2 =2x\r
\n" ); document.write( "\n" ); document.write( "x^2-8x+16=2x\r
\n" ); document.write( "\n" ); document.write( "x^2-10x+16=0\r
\n" ); document.write( "\n" ); document.write( "x^2-8x-2x+16=0\r
\n" ); document.write( "\n" ); document.write( "x(x-8)-2(x-8)=0
\n" ); document.write( "(x-8)(x-2)=0
\n" ); document.write( "x= 2 OR 8\r
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