问题
解答题
通分: (1)
(2)
|
答案
(1)
=c a2b4
,-c4 a2b4c3
=-a2 bc3
;a4b3 a2b4c3
(2)
=1 x2-4
=1 (x+2)(x-2)
,2 2(x+2)(x-2)
=-x 4-2x
=-x 2(x-2)
;x(x+2) 2(x+2)(x-2)
通分: (1)
(2)
|
(1)
=c a2b4
,-c4 a2b4c3
=-a2 bc3
;a4b3 a2b4c3
(2)
=1 x2-4
=1 (x+2)(x-2)
,2 2(x+2)(x-2)
=-x 4-2x
=-x 2(x-2)
;x(x+2) 2(x+2)(x-2)