问题
解答题
约分: (1)
(2)
|
答案
(1)原式=
=--7a2b3•5a2c 7a2b3•3bd
;5a2c 3db
(2)原式=
=(x+y-z)(x-y+z) (x+y+z)(x+y-z)
.x-y+z x+y+z
约分: (1)
(2)
|
(1)原式=
=--7a2b3•5a2c 7a2b3•3bd
;5a2c 3db
(2)原式=
=(x+y-z)(x-y+z) (x+y+z)(x+y-z)
.x-y+z x+y+z