document.write( "Question 102832: Find the solution of using substitution, elimination or Cramers Rule
\n" ); document.write( "x^2+y^2=7
\n" ); document.write( "x-y^2=-1
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Algebra.Com's Answer #74772 by checkley75(3666)\"\" \"About 
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X-Y^2=-1
\n" ); document.write( "X=Y^2-1
\n" ); document.write( "(Y^2-1)^2+Y^2=7
\n" ); document.write( "Y^4-2Y^2+1+Y^2-7=0
\n" ); document.write( "Y^4-Y^2-6=0
\n" ); document.write( "(Y^2-3)(Y^2+2)=0
\n" ); document.write( "Y^2-3=0
\n" ); document.write( "Y^2=3
\n" ); document.write( "Y=SQRT3
\n" ); document.write( "Y=1.732 ANSWER.
\n" ); document.write( "Y^2+2=0
\n" ); document.write( "Y^2=-2
\n" ); document.write( "Y=1.414i ANSWER.
\n" ); document.write( "USING THE EQUATION X=Y^2-1 WE SOLVE FOR X:
\n" ); document.write( "X=-2-1
\n" ); document.write( "X=-3 ANSWER.
\n" ); document.write( "X=3-1
\n" ); document.write( "X=2 ANSWER.\r
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