3y-9/x²-xy+x-y / xy-3x+2y-6/x²-y²= 3(y-3)/x*(x-y)+x-y * x²-y²/xy-3x+2y-6=3(y-3)/(x+1)(x-y) * (x-y)*(x+y)/x*(y-3)+2(y-3)=3(y-3)/x+1 * x+y/(x+2)(y-3)=3/x+1 * x+y/x+2=3(x+y)/(x+1)(x+2)=3x+3y/x²+2x+x+2=3x+3y/x²+3x+2
1.4 3.1 4.4 В1-2; В2-10 С1 у=х+3 и у не равен 3,так как знаменатель не равен 3. при х=3 у=6. у=-рх 6=-р*3 р=-2