计算:(1) a 2 - b 2 a 2 +2ab+ b 2 ÷ 2a-2b a+b &n...

计算:(1) a 2 - b 2 a 2 +2ab+ b 2 ÷ 2a-2b a+b (2) 2x x 2 -4 - 1 x-2 .
2025-04-30 07:05:16
推荐回答(1个)
回答1:

(1)原式=
(a+b)(a-b)
(a+b ) 2
?
a+b
2(a-b)
=
1
2

(2)原式=
2x-(x+2)
(x+2)(x-2)
=
x-2
(x+2)(x-2)
=
1
x+2