x+(-y+3) x-(-3-y) -(x-y)+3 3-(X+Y) 怎样去括号?快
3x-【(y-x)-2x-y】 去括号,
去括号3(x-y)-2(2x-y)=
—[—(3x-y)]去括号.
3(x+y)平方怎么去括号
3(x-y)的二次方怎样去括号
计算2x/x^2-y^2 3x/y^2-x^2 y/(x y)(y-x)快!
去括号(4x-3y)-[-(3-x)+(x-y)]-5x 还是去括号4xy²-3x²y-{3x
3x-(3x+4y)+(4x+2y)去括号,并合并同类项
x-(3x+y)+(x-5y)去括号,合并同类项
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y