document.write( "Question 1066253: 2y^2+5xy=1...............equation (1)
\n" ); document.write( "3x-2y,=-6.....................equation (2) \n" ); document.write( "
Algebra.Com's Answer #681423 by Boreal(15235)\"\" \"About 
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2y^2+5xy=1
\n" ); document.write( "3x-2y=-6; 3x=2y-6;x=(2y/3)-2
\n" ); document.write( "2y^2+{5(2y/3)-10}y=1; 2y^2+(10/3)y^2-10y-1=0
\n" ); document.write( "(16/3)y^2-10y-1=0
\n" ); document.write( "16y^2-30y-3=0
\n" ); document.write( "y=(1/32)(30+/- sqrt (900+192))
\n" ); document.write( "y=(1/32)(30+/-33.05)
\n" ); document.write( "y=(1/32)63.05)=1.970
\n" ); document.write( "y=(1/32)(-3.05)=-0.0953
\n" ); document.write( "put into second equation
\n" ); document.write( "3x-3.94=-6
\n" ); document.write( "3x=-2.06
\n" ); document.write( "x=-0.687
\n" ); document.write( "try both in top equation
\n" ); document.write( "7.76+5(-.687*1.97)=7.76-6.767=0.99 within range with rounding error.
\n" ); document.write( "(-0.687,1.97)
\n" ); document.write( "try second
\n" ); document.write( "3x+0.1906=-6
\n" ); document.write( "3x=-6.1906
\n" ); document.write( "x=-2.064
\n" ); document.write( "check in top equation
\n" ); document.write( "0.0181+(5*-2.064*-0.0953)=0.0181+0.9832 (rounding only here)=1.0013
\n" ); document.write( "(-2.064,-0.0953)\r
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