document.write( "Question 131441: the square root of x-4 - the square root of x+8 =2 \n" ); document.write( "
Algebra.Com's Answer #95950 by edjones(8007)\"\" \"About 
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sqrt(x-4)-sqrt(x+8)=2
\n" ); document.write( "sqrt(x-4)-2=sqrt(x+8)
\n" ); document.write( "x-4-4sqrt(x-4)+4=x+8 square both sides.
\n" ); document.write( "-4sqrt(x-4)=8
\n" ); document.write( "(-4sqrt(x-4))^2=8^2
\n" ); document.write( "16(x-4)=64
\n" ); document.write( "16x-64=64
\n" ); document.write( "16x=128
\n" ); document.write( "x=8
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\n" ); document.write( "Check:
\n" ); document.write( "sqrt(8-4)-sqrt(8+8)=2
\n" ); document.write( "2-4=2 False
\n" ); document.write( "There is no answer to this equation.
\n" ); document.write( ".
\n" ); document.write( "Ed\r
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