若两圆x^2+y^2-10x-10y=0与x^2+y^2-6x+2y-40=0相交于两点,则它们的公共弦所在的直线方程是

{4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 若x-y不等于0,2x-3y=0,则分式(10x-11y)/(x-y)的值是（）?(10x-11y)/(x-y) =[(8x-8y)+(2x-3y)]/(x-y) =8为什么8X-8Y=8？(10x-11y)/(x-y)=[(8x-8y)+(2x-3y)]/(x-y)=8+(2x-3y)]/(x-y)=8+0=8 x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以（x^2+y^2/y)^2的值 (x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10 2x-y=0与x+y=10 求f(x,y)=x+y+7的最大值,使(x,y)满足x+2y≤10,2x+y≥6,y≥0 已知x^2+y^2--6x--2y+10=0,求x+y/x--y 已知x^2+y^2+6x-2y+10=0,求x+y/x-y的值谢谢 已知x^2-2x+y^2+6y+10=0,求分式x-y/x+y的值 已知x-y-3绝对值+(2x+2y+10)的平方=0,则(x+y)(x-Y)= 已知x^2+y^2-10x-12y+61=0,求x/y-y/x的值 已知：4x^2+y^2-4x-6y+10=0,求y/x-x/y的值 已知x、y满足：x^2+y^2+6x-10y+34=0,求y-x的值 若x^2+y^2-10x-6y+34=0,求（x-y)/(x+y)的值 已知（x+y）(x+y-10)+25=0,且x-y=2,求x,y的值? 已知实数x, y满足x²+y²-2x+6y+10=0,求y∧-x.