问题
解答题
计算: (1)
(2)[
|
答案
(1)原式=2
-4+9-22
+2 1 2
=5
;1 2
(2)原式=
•(a+b)2+a2-b2 a2-b2 1 2a
=
•2a2+2ab a2-b2 1 2a
=
.1 a-b
计算: (1)
(2)[
|
(1)原式=2
-4+9-22
+2 1 2
=5
;1 2
(2)原式=
•(a+b)2+a2-b2 a2-b2 1 2a
=
•2a2+2ab a2-b2 1 2a
=
.1 a-b