先化简(Xy-2y)(xy+2y)-(x-y)^2-x^2y^2,并求当x=1/2,y=2时的代数式的值快啊在线deng今晚要
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![先化简(Xy-2y)(xy+2y)-(x-y)^2-x^2y^2,并求当x=1/2,y=2时的代数式的值快啊在线deng今晚要](/uploads/image/z/1130959-55-9.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%EF%BC%88Xy-2y%EF%BC%89%28xy%2B2y%29-%28x-y%29%5E2-x%5E2y%5E2%2C%E5%B9%B6%E6%B1%82%E5%BD%93x%3D1%2F2%2Cy%3D2%E6%97%B6%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC%E5%BF%AB%E5%95%8A%E5%9C%A8%E7%BA%BFdeng%E4%BB%8A%E6%99%9A%E8%A6%81)
先化简(Xy-2y)(xy+2y)-(x-y)^2-x^2y^2,并求当x=1/2,y=2时的代数式的值快啊在线deng今晚要
先化简(Xy-2y)(xy+2y)-(x-y)^2-x^2y^2,并求当x=1/2,y=2时的代数式的值
快啊在线deng今晚要
先化简(Xy-2y)(xy+2y)-(x-y)^2-x^2y^2,并求当x=1/2,y=2时的代数式的值快啊在线deng今晚要
X平方Y平方-4Y平方-X平方+2XY-Y平方-X平方Y平方.再化简就行了
1
先化简,:(-三分之一xy)^2【xy(2x-y)-2x(xy-y^2)】
(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程
(xy-x²)÷(x²-2xy+y²/xy)×(x-y/x²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
x^2-xy/xy-y^2约分
计算:3xy[2xy-x(y-2)+x]
分解因式:(X+Y)*(X+Y+2XY)+(XY+1)*(XY-1)
1.(xy-1)^2-(x+y-2xy)(2-x-y)2.(x+y)(x+y+2xy)+(xy-1)(xy+1)
【2x(x平方y-xy平方)+xy(xy(xy-x平方)】除以x平方y
计算:3xy(x²y-xy²+xy)-xy²(2x-xy+2x)
2x²y-3(2xy-xy)-xy
(x^2+xy/x-y)/(xy/x-y)计算
5xy^2-{2x^y-[3xy^2-(xy^2-2x^2y)]/(-1/2xy)}
化简3x^2y-[2xy^2-2(xy-3/2x^2y)+xy]+3xy^2
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y(化简)
(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
.(x+y-2)(x+y-2xy)+(xy-1)^2