问题
解答题
计算: (1)
(2)
|
答案
(1)原式=3+
-2-5=3
-4;3
(2)原式=
-4 (a-2)(a+2)
=a+2 (a+2)(a-2)
=-4-a-2 (a+2)(a-2)
=-a-2 (a+2)(a-2)
.1 a+2
计算: (1)
(2)
|
(1)原式=3+
-2-5=3
-4;3
(2)原式=
-4 (a-2)(a+2)
=a+2 (a+2)(a-2)
=-4-a-2 (a+2)(a-2)
=-a-2 (a+2)(a-2)
.1 a+2