问题
解答题
计算: (1)
(2)
(3)
|
答案
(1)原式=400×5
=
×202 5
=20
;5
(2)原式=
•(2ab)2 b
=2ab
;b
(3)原式=x2(x2+y2)
=x
.x2+y2
计算: (1)
(2)
(3)
|
(1)原式=400×5
=
×202 5
=20
;5
(2)原式=
•(2ab)2 b
=2ab
;b
(3)原式=x2(x2+y2)
=x
.x2+y2