(x²+2xy+y²)除以(x+y)

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(x²+2xy+y²)除以(x+y)
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(x²+2xy+y²)除以(x+y)
(x²+2xy+y²)除以(x+y)

(x²+2xy+y²)除以(x+y)
(x²+2xy+y²)除以(x+y)
=(x+y)²除以(x+y)
=x+y

(x²+2xy+y²)除以(x+y)
=(x+y)²/(x+y)
=x+y

(x²+2xy+y²)除以(x+y)
=(x+y)²除以(x+y)
=x+y

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等于x+y