document.write( "Question 60914: I can only solve part of this equation and then I get stuck. Can someone show me the next steps I need to take and explain how they are done? I have done the equation as far as I can:\r
\n" ); document.write( "\n" ); document.write( "SQRT(2X-1)+SQRT(X-4)= 4 <----original equation\r
\n" ); document.write( "\n" ); document.write( "SQRT(2X-1)=4-SQRT(X-4)
\n" ); document.write( "(SQRT<2X-1>)^2 = (4-SQRT)^2
\n" ); document.write( "2X-1 = (4-SQRT)(4-SQRT) <------I am lost as to how to solve finish this side of the equation.\r
\n" ); document.write( "\n" ); document.write( "Thanks!
\n" ); document.write( "

Algebra.Com's Answer #41868 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
\"sqrt%282X-1%29%2Bsqrt%28X-4%29=4\" <----original equation\r
\n" ); document.write( "\n" ); document.write( "\"sqrt%282X-1%29=4-sqrt%28X-4%29\"
\n" ); document.write( "\"sqrt%282X-1%29%5E2=%284-sqrt%28X-4%29%29%5E2\"
\n" ); document.write( "\"2X-1=%284-sqrt%28X-4%29%29%284-sqrt%28X-4%29%29\"
\n" ); document.write( "\"2x-1=4%284-sqrt%28x-4%29%29-sqrt%28x-4%29%284-sqrt%28x-4%29%29\"
\n" ); document.write( "\"2x-1=16-4sqrt%28x-4%29-4sqrt%28x-4%29%2Bsqrt%28x-4%29%5E2\"
\n" ); document.write( "\"2x-1=16-8sqrt%28x-4%29%2Bx-4\"
\n" ); document.write( "\"2x-1=-8sqrt%28x-4%29%2Bx%2B12\"
\n" ); document.write( "\"2x-x-1-12=-8sqrt%28x-4%29%2Bx-x%2B12-12\"
\n" ); document.write( "\"x-13=-8sqrt%28x-4%29\"
\n" ); document.write( "\"%28x-13%29%5E2=%28-8sqrt%28x-4%29%29%5E2\"
\n" ); document.write( "\"x%5E2-26x%2B169=64%28sqrt%28x-4%29%29%5E2\"
\n" ); document.write( "\"x%5E2-26x%2B169=64%28x-4%29\"
\n" ); document.write( "\"x%5E2-26x%2B169=64x-256\"
\n" ); document.write( "\"x%5E2-26x-64x%2B169%2B256=0\"
\n" ); document.write( "\"x%5E2-90x%2B425=0\"
\n" ); document.write( "(x-5)(x-85)=0
\n" ); document.write( "x-5=0 and x-85=0
\n" ); document.write( "x=5 and x=85
\n" ); document.write( "Check for extraneous solutions:
\n" ); document.write( "Let x=5
\n" ); document.write( "\"sqrt%282%285%29-1%29%2Bsqrt%28%285%29-4%29=4\"
\n" ); document.write( "\"sqrt%2810-1%29%2Bsqrt%285-4%29=4\"
\n" ); document.write( "\"sqrt%289%29%2Bsqrt%281%29=4\"
\n" ); document.write( "\"3%2B1=4\"
\n" ); document.write( "4=4 x=5 is a valid solution.
\n" ); document.write( "let x=85
\n" ); document.write( "\"sqrt%282%2885%29-1%29%2Bsqrt%28%2885%29-4%29=4\"
\n" ); document.write( "\"sqrt%28170-1%29%2Bsqrt%2885-4%29=4\"
\n" ); document.write( "\"sqrt%28169%29%2Bsqrt%2881%29=4\"
\n" ); document.write( "\"13%2B9=4\"
\n" ); document.write( "\"22=4\" x=85 is an extraneous solution, it's not valid.
\n" ); document.write( "Therefore the solution is: \"highlight%28x=5%29\"
\n" ); document.write( "Happy Calculating!!!
\n" ); document.write( "
\n" );