Răspunsuri

2014-05-04T23:12:58+03:00
Xy-3x+y=3 => xy+y-3x-3=0 => y(x+1)-(x+1)=0  => (y-1)(x+1)=0 => y=1 si x=-1
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2014-05-05T02:25:17+03:00
Xy-3x+y-3=x(y-3)+(y-3)=(x+1)(y-3)=0 =>pt x=-1, orice y, pt y=3, orice x.