document.write( "Question 145751: Help I am trying to fully understand how to find the real solutions of the system. I have no problem solving a problem like : x^2+2y^2=12 and 3x^2-y^2=8 but when the problem looks like this: xy+6=0 and x-y=-5 I cant figure out where to start. Your help would do a lot for me thanks. \n" ); document.write( "
Algebra.Com's Answer #106369 by oscargut(2103)![]() ![]() You can put this solution on YOUR website! xy+6=0 \n" ); document.write( "x-y=-5 then x=y-5\r \n" ); document.write( "\n" ); document.write( "then using the 1st eq we have (y-5)y+6=0 then y^2-5y+6=0\r \n" ); document.write( "\n" ); document.write( "solving this eq solutions are 3 and 2 so y=2 or y=3\r \n" ); document.write( "\n" ); document.write( "if y=2 then x=-3 \n" ); document.write( "if y=3 then x=-2\r \n" ); document.write( "\n" ); document.write( "Solutions are (-3,2) and (-2,3)\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |