(x+y）（x+y+10)+25=0 x-y=3.求x,y的值(x+y）（x+y-10)+25=0 x-y=3.求x,y的值

(x+y)(x+y-10)+25=0,且x-y=3,求x,y (x+y)(x+y-10)+25=0,且x-y=3,求x,y (x+y）（x+y+10)+25=0 x-y=3.求x,y的值(x+y）（x+y-10)+25=0 x-y=3.求x,y的值 已知x-y=3 ,(x+y）（x+y+10)+25=0 求x,y的值 (x+y）（x+y+10)+25=0 x-y=3 求x,y的值 已知（x+y）(x+y-10)+25=0,且x-y=2,求x,y的值? 已知x²+y²-8x+6y+25=0,求（x-y+4xy/x-y）（x+y-4xy/x+y） 已知x²+y²+6x-8x+25=0,求（x/x²-y² - 1/x+y）÷y/y-x 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 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? x²+y²-6x+8y+25=0求（x-y）-² （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 先化简,再求值 [2/3x - 2/x+y（x+y/3x -x-y）]*x/x-y,其中5x+3y=0 已知（x+y）（x+y-10）+25=0,且x-y=3,求x,y的值 化简 x / y(x+y) - y / x(x+y) = (x+y)²-10(x+y)+25