求这道题的详细步骤

2025-05-13 22:29:51
推荐回答(2个)
回答1:

解,原式=(x+2)^2/(x(x+2))÷(2x^2/x-((4+x^2)/ⅹ)
=(x+2)/x÷((x^2-4)/ⅹ)
=(ⅹ+2)/x÷((x+2)(x-2)/x)
=1/(ⅹ-2)

回答2:

原式=(x+2)²/x(x+2) ÷(2x²-x²-4)/x
=(x+2)÷(x²-4)
=(x+2)÷【(x+2)(x-2)】
=1/(x-2)