问题
解答题
(1)
(2)
(3)
(4)
(5)
(6)-
(7)-
(8)-
(9)
(10)
|
答案
(1)原式=1;
(2)原式=
;b2 a2
(3)原式=
;1 4y
(4)原式=
;2x 3y
(5)原式=-7b2;
(6)原式=-
;xy2 4a
(7)原式=-
×18a2b2 7cd 7c2d4 9ab3
=-
;2acd3 b
(8)原式=-
×(b2c 2a2
)4a -bc2
=
;2b ac
(9)原式=
×(-3a 4b
)1 9a2b
=-
;1 12ab2
(10)原式=
×4x4y2 15a3
的35a2 -8x2y2
=-
.7x2 6a