怎么化简代数式如〈4x-2y〕-〖-〔-2y-x〕+〔x-y〕〗-5x〖〗是中括号怎么化简2x^2y+2xy-[3x^2
怎么化简代数式如〈4x-2y〕-〖-〔-2y-x〕+〔x-y〕〗-5x〖〗是中括号怎么化简2x^2y+2xy-[3x^2
2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分
化简代数式的几道题3(x-1)-(x-5)2(x^2-y^2)-3(x^2-2y^2)(x+y)+3(x-y)-4(x+
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*
化简求值 -3(2x-y)-{7x-〔6x+2x-(10x-8y)〕-x-2(3x-4y)}
谁帮我化简:[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy
化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy
(x^2-xy)y÷y-x/xy怎么做?
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
先化简再求值{(x-y)(x+y)-(x+y)(x-2y)}/y 其中xy的值是代数式{(3x-2y-7)^2+|2x+
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x-y=4,xy=-2,求代数式〔2x+3y-2xy〕-〔x+4y+xy〕-〔3xy+2y-2x〕的值