Question

初二数学的计算题 大家帮帮忙

Answer 1

（x+1）（x-1）/（x-1）（x+2）÷（x²+2x+1/x²+2x）
=(x+1)/(x+2)÷[(x+1)²/x(x+2)]
=(x+1)/(x+2)×x(x+2)/(x+1)²
=x/(x+1)

Answer 2

=(X+1)(X-1)/(X-1)(X+2)除以 （X^2+2X+1)/X^2+2X
=(X+1)/(X+2)除以 （X+1)^2/(X(X+2))
=X/(X+1)
采纳吧 O(∩_∩)O哈！

Answer 3

=(x+1)(x-1)/(x+2)(x-1) * x(x+2)/(x+1)^2 = x/(x+1)

Answer 4

(x-1)(x+1)/(x+2)(x-!)*x(x+2)/(x+1)^2
=x/(x+1)

Answer 5

=(x+1)(x-1)/(x-1)(x+2)除以[（x^2+2x+1)/X(x+2)]
=(x+1）/(X+2）*[x(x+2)/(x+1)^2]
=x/(x+1)
希望帮到你哦

Answer 6