如果x^2-10x+y^2-16y+89=0,则x=__,y=__感时间x^2表示x的平方

如果x^2-10x+y^2-16y+89=0,则x=__,y=__感时间x^2表示x的平方 紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(X-Y)^2*(Y-X)得数是（X-Y)*(Y-X)吗?如果不是.. 如果|X|=4 |Y|=2 且|X+Y|=X+Y 求X+Y 如果2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值 如果2X-Y=10,求代数式[(X²+Y²)-(X-Y)²+2Y(X-Y)]÷4Y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 如果X-4=Y+2如果X-4=y+2则X-Y=? 如果x-y=2,那么4-x+y= 如果2X:7Y,那么x:y=( ):( ) 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)^2-16(x-y)^2 (x+y)^2-16(x-y)^2 x.y是非零实数,如果2x-y/3y=y/x,那么x/y= 16-8（x-y)+(x-y)2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 如果(x+2y)^2-2(x+2y)(x-2y)+(x-2y)^2=16y且(2x-y)^2+2(2x-y)(2x+y)+(2x+y)^2=-16x求(x^y)^2003的值 x y都不等于0