问题
解答题
通分: (1)
(2)
|
答案
(1)
=x 6ab2
,3acx 18a2b2c
=y 9a2bc
;2by 18a2b2c
(2)
=1 x2-5x
,x+5 x(x+5)(x-5)
=2 x2-25
,2x x(x+5)(x-5)
=3 x2+5x
.3(x-5) x(x+5)(x-5)
通分: (1)
(2)
|
(1)
=x 6ab2
,3acx 18a2b2c
=y 9a2bc
;2by 18a2b2c
(2)
=1 x2-5x
,x+5 x(x+5)(x-5)
=2 x2-25
,2x x(x+5)(x-5)
=3 x2+5x
.3(x-5) x(x+5)(x-5)