document.write( "Question 198882: if x+y=9 and y-x=7, then x^2+y^2= ? \n" ); document.write( "
Algebra.Com's Answer #149410 by radikrr(7)\"\" \"About 
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x+y=9
\n" ); document.write( "y-x=7\r
\n" ); document.write( "\n" ); document.write( "y=x+7 x+x+7=9 2x=2 x=1 y=8\r
\n" ); document.write( "\n" ); document.write( "x^2+y^2= 1^2+8^2=65
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