Y的平方+2Y+1分之xy+x

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Y的平方+2Y+1分之xy+xY的平方+2Y+1分之xy+xY的平方+2Y+1分之xy+x解(xy+x)/(y²+2y+1)=x(y+1)/(y+1)²=x/(y+1)=x(y+1

Y的平方+2Y+1分之xy+x
Y的平方+2Y+1分之xy+x

Y的平方+2Y+1分之xy+x

(xy+x)/(y²+2y+1)
=x(y+1)/(y+1)²
=x/(y+1)

=x(y+1)/(y+1)²
=x/(y+1)