因式分解：(x+y)(x-3y)+2xy+2y^2

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因式分解：(x+y)(x-3y)+2xy+2y^2
因式分解：(x+y)(x-3y)+2xy+2y^2

因式分解：(x+y)(x-3y)+2xy+2y^2
：(x+y)(x-3y)+2xy+2y^2
=(x+y)(x-3y)+2y(x+y)
=(x+y)(x-3y+2y)
=(x+y)(x-y)

(x+y)(x-3y)+2xy+2y²=(x+y)(x-3y)+2y(x+y)=(x+y)(x-y)

(x+y)(x-3y)+2xy+2y^2
=(x+y)(x-3y)+2y(x+y)
=(x+y)(x-3y+2y)
=(x+y)(x-y)

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