x^2-2xy+y^2+4x-4y+4快分解因式
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因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
2x:y=4 xy成啥比例快
(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)
计算:2xy/(x+y)².(x+y)/4y
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
x^2-2xy+y^2+4x-4y+4快分解因式
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(x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy)
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化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
因式分解x^2(x-y)-4xy(x-y)-4y^2(y-x)
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
化简2(x²y+xy)-3(x²y-xy)-4x²y