document.write( "Question 382786: {x^2-3y^2=-1
\n" ); document.write( "{2x^2-7y^2=-5 \n" ); document.write( "

Algebra.Com's Answer #271231 by Fombitz(32388) $\"\"$ $\"About$

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1. $\"x%5E2-3y%5E2=-1\"$
\n" ); document.write( "2. $\"2x%5E2-7y%5E2=-5\"$
\n" ); document.write( "Multipy eq. 1 by -2 and add to eq. 2,
\n" ); document.write( " $\"-2x%5E2%2B6y%5E2%2B2x%5E2-7y%5E2=2-5\"$
\n" ); document.write( " $\"-y%5E2=-3\"$
\n" ); document.write( " $\"y=0+%2B-+sqrt%283%29\"$
\n" ); document.write( "Then use either equation to solve for $\"x\"$ .
\n" ); document.write( " $\"x%5E2-3%283%29=-1\"$
\n" ); document.write( " $\"x%5E2=8\"$
\n" ); document.write( " $\"x=0+%2B-+2%2Asqrt%282%29\"$
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