[(x+2y)(x-2y)-(2x-y)^+(3x-y)(2x-5y)]除(-2分之1乘x) 化简
[(x+2y)(x-2y)-(2x-y)^+(3x-y)(2x-5y)]除(-2分之1乘x) 化简
(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?
1、x(x-y)(x+y)-x(x+y)^2
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
(1)(x^2/x)-y-x-y
(2x+y-1)(2x-y+1)-(3x+y)(3x-y),其中x=5分之1,
数学(x-y)^5*(y-x)^3*(x-y)^2
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
化简求值【(x+2y)的平方-(x+y)(x-y)-5y方】除2x ,其中x=-2,y=2分之1
(X+Y分之X+X+Y分之2Y)乘X+2Y分之XY除以(X分之1+Y分之1)要有过程
(x+y分之x + x+y分之2y)乘x+2y分之xy 除以(x分之1+y分之1)同样用两...
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)