(x平方+2xy+y的平方)/(x+y)

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(x平方+2xy+y的平方)/(x+y)(x平方+2xy+y的平方)/(x+y)(x平方+2xy+y的平方)/(x+y)(x平方+2xy+y的平方)/(x+y)=(x+y)²/(x+y)=x

(x平方+2xy+y的平方)/(x+y)
(x平方+2xy+y的平方)/(x+y)

(x平方+2xy+y的平方)/(x+y)
(x平方+2xy+y的平方)/(x+y)
=(x+y)²/(x+y)
=x+y

=(x+y)²/(x+y)
=x+y

(x²+2xy+y²)/(x+y)
=(x+y)²/(x+y)
=x+y