document.write( "Question 1129186: Use any method to solve the nonlinear system. (Order your answers from smallest to largest x, then from smallest to largest y. If there is no solution, enter NO SOLUTION.)\r
\n" ); document.write( "\n" ); document.write( "x^2 + y^2= 6
\n" ); document.write( "xy= 1\r
\n" ); document.write( "\n" ); document.write( "Can someone help, I use the method of and my final answers, which keeps being tagged incorrect, have been:
\n" ); document.write( "x: \"+sqrt%282+%29+\" -1, y: \"+sqrt%28+2+%29+\" +1
\n" ); document.write( "x: - \"+sqrt%282+%29+\" +1, y: - \"+sqrt%28+2+%29+\" -1
\n" ); document.write( "x: \"+sqrt%282+%29+\" +1, y: \"+sqrt%28+2+%29+\"-1
\n" ); document.write( "x: - \"+sqrt%282+%29+\" -1, y: - \"+sqrt%28+2+%29+\" +1\r
\n" ); document.write( "\n" ); document.write( "Am I just incorrectly ordering them from smallest to least or are the entire answers wrong?
\n" ); document.write( "Here is some of my work:
\n" ); document.write( "For x^2 + y^2= 6, substitute x with 1/y.
\n" ); document.write( "(1/y)^2 +y^2= 6; \r
\n" ); document.write( "\n" ); document.write( "For xy=1, substitute y with \"+sqrt%282+%29+\" +1
\n" ); document.write( "x(\"+sqrt%282+%29+\" +1 )=1
\n" ); document.write( "x= \"+sqrt%282+%29+\" -1\r
\n" ); document.write( "\n" ); document.write( "For xy=1, substitute y with \"+sqrt%282+%29+\" -1
\n" ); document.write( "x(\"+sqrt%282+%29+\" -1 )=1
\n" ); document.write( "x= \"+sqrt%282+%29+\" +1\r
\n" ); document.write( "\n" ); document.write( "For xy=1, substitute y with -\"+sqrt%282+%29+\" +1
\n" ); document.write( "x(-\"+sqrt%282+%29+\" +1 )=1
\n" ); document.write( "x= -\"+sqrt%282+%29+\" -1\r
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Algebra.Com's Answer #745739 by MathLover1(20850)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "\"x%5E2+%2B+y%5E2=+6\"........eq.1
\n" ); document.write( "\"xy=+1\" ........eq.2
\n" ); document.write( "-----------------------\r
\n" ); document.write( "\n" ); document.write( "\"xy=+1\" ........eq.2=> \"x=1%2Fy\"\r
\n" ); document.write( "\n" ); document.write( "substitute in eq.1\r
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\n" ); document.write( "\n" ); document.write( "\"%281%2Fy%29%5E2+%2B+y%5E2=+6\"........eq.1\r
\n" ); document.write( "\n" ); document.write( "\"1%2Fy%5E2+%2B+y%5E2=+6\"...multiply by \"y%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"1+%2B+y%5E4=+6y%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"+y%5E4-+6y%5E2%2B1=0\"...factor\r
\n" ); document.write( "\n" ); document.write( "\"%28y%5E2+-+2+y+-+1%29+%28y%5E2+%2B+2+y+-+1%29=0\"\r
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\n" ); document.write( "\n" ); document.write( "solutions: there will be four \r
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\n" ); document.write( "\n" ); document.write( "if \"%28y%5E2+-+2+y+-+1%29+=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%28-%28-2%29+%2B-+sqrt%28+%28-2%29%5E2-4%2A1%2A%28-1%29+%29%29%2F%282%2A1%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%282+%2B-+sqrt%28+4%2B4%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%282+%2B-+sqrt%28+2%2A4%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%282+%2B-+2sqrt%28+2%29%29%2F2+\"...simplify\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%281+%2B-+sqrt%28+2%29%29+\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "so, \"highlight%28y+%5B1%5D=+1+%2B+sqrt%28+2%29%29+\" or \"highlight%28y%5B2%5D+=+1+-+sqrt%28+2%29%29+%29\"\r
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\n" ); document.write( "\n" ); document.write( "if\"+%28y%5E2+%2B+2+y+-+1%29=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+%28-2+%2B-+sqrt%28+2%5E2-4%2A1%2A%28-1%29+%29%29%2F%282%2A1%29+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%28-2+%2B-+sqrt%28+4%2B4+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%28-2+%2B-+2sqrt%282+%29%29%2F2+\"\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%28-1+%2B-+sqrt%282+%29%29+\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"highlight%28y%5B3%5D+=+-1+%2B+sqrt%282+%29+%29\" or \"highlight%28y%5B4%5D+=+-1+-+sqrt%282+%29+%29\"\r
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\n" ); document.write( "\n" ); document.write( "now find \"x\" using all 4 solutions for \"y\"\r
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\n" ); document.write( "\n" ); document.write( "if \"y+%5B1%5D=+1+%2B+sqrt%28+2%29+\", since \"x=1%2Fy\" we have \r
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\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\"highlight%28x%5B1%5D=sqrt%282%29+-+1%29+%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "if \"y+%5B2%5D=+1+-+sqrt%28+2%29+\"\r
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\n" ); document.write( "\"highlight%28x%5B2%5D=+-+1-sqrt%282%29%29+\"\r
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\n" ); document.write( "\n" ); document.write( "if \"y%5B3%5D+=+-1+%2B+sqrt%282+%29=+sqrt%282+%29-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28x%5B3%5D=sqrt%28+2%29%2B1%29\"\r
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\n" ); document.write( "\n" ); document.write( "if \"y%5B4%5D+=+-1+-+sqrt%282+%29+\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28x%5B4%5D=1-sqrt%282+%29%29\"\r
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