document.write( "Question 148082: What is x in the equation:
\n" ); document.write( " $\"x%5E2-x-4\"$ = $\"sqrt%28x%5E2-x-2%29\"$ \n" ); document.write( "

Algebra.Com's Answer #108481 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^2-x-4 = sqrt(x^2-x-2)
\n" ); document.write( "Square both sides to get:
\n" ); document.write( "x^2 - x -2 = (x^2-(x+4)*(x^2-(x+4))
\n" ); document.write( "x^2 - x -2 = x^4 -2x^2(x+4)+(x+4)^2
\n" ); document.write( "x^2 -x -2 = x^4 -2x^3-8x^2+x^2+8x+16
\n" ); document.write( "x^2 -x -2 = x^4 -2x^3 -7x^2 + 8x + 16
\n" ); document.write( "x^4 -2x^3 -8x^2 + 9x + 18 = 0
\n" ); document.write( "x=-2 or x = -1.3027756.. or x = 2.3027756 or x = 3
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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