x^2+4x+4/x+2÷(x^2+2x)

问题描述:

x^2+4x+4/x+2÷(x^2+2x)

(x^2+4x+4)/(x+2) ÷ (x^2+2x)
= (x+2)^2/(x+2) ÷ x(x+2)
=1 ÷ x
=1/x