x^2-4xy+3y^2=(x-3y)(x-y)x^2-4xy+3y^2 怎么分解成(x-3y)(x-y)
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因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
(-3x^y+2xy)-( )=4x^+xy
x^2-4xy+3y^2=(x-3y)(x-y)x^2-4xy+3y^2 怎么分解成(x-3y)(x-y)
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