X^2+Y^2+2X-6Y+10=0(x²+2x+1)+(y²-6y+9)=0(x+1)²+(y-3)²=0x=-1,y=3(X+Y)分之Y^2=3²/(-1+3)=9/2(X-Y)分之(X-1)=(-1-1)/(-1-3)=1/2要化简的分不出分子分母,把x=-1,y=3代入计算就可以了,...