整体去括号;化简[5(x-y)-3(x-y)-(x-y)+2(x-y)]-2(x-y)
3x-【(y-x)-2x-y】 去括号,
去括号3(x-y)-2(2x-y)=
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
数学(x-y)^5*(y-x)^3*(x-y)^2
化简:[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(2X-3y)-(5x-y)
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
去括号并合并同类项(1)3x-2(x+7)+2(2x+5) (2)(4x-3y)-[-(3y-x)+(x-y)]-5x
1,5{2x-7y}-3{4x-10y} 2,{x-y}-[3x+{-x+y}] 去括号,合并同类项,
若将x-y看成一个整体,合并多项式(x-y)2+3(x-y)-2(y-x),可得多少
若将x-y看成一个整体,合并多项式(x-y)+3(x-y)-2(y-x),可得-------