x²y+2xy-3y怎么化简
化简求值3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
化简求值:x-y/x²-2xy+y²-xy+y²/x²-y²,其中(x
化简求值:(-1/3XY)²[xy(2x-y)-2x(xy-y²)],其中X=-3/2,Y=-2
化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy
5xy^2-[3xy^2-(4xy^2-2x^y)]+x^2y-xy^2如何化简
化简求值3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy² ,当x
化简并求值 xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y},其中x=1,
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&
(x^2-xy)y÷y-x/xy怎么做?
怎么化简(x-y+4xy/x-y)(x+y-4xy/x+y)(/是分数线)
谁帮我化简:[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy
化简求值:(2x²y-2xy²)-【(-3x²y²+3x²y)】,其中