问题
解答题
计算: (1)2
(2)
(3)
(4)
|
答案
(1)原式=(2×3)×3×12
=6×6
=36;
(2)原式=a(a4+2a2b2+b4)
=a(a2+b2)2
=(a2+b2)
;a
(3)原式=(1×
×4)×5 2
×10 3
×3 5 7 5
=1014 5
=10×1 5 70
=2
;70
(4)原式=
•a b
•1 ab 1 ab
=1 ab3
=
.ab ab2