问题
解答题
计算: (1)
(2)
|
答案
(1)原式=
•a+b 5ab 15a2b a2-b2
=
;3a a-b
(2)原式=5x+3y-2x x2-y2
=3(x+y) (x+y)(x-y)
=
.3 x-y
计算: (1)
(2)
|
(1)原式=
•a+b 5ab 15a2b a2-b2
=
;3a a-b
(2)原式=5x+3y-2x x2-y2
=3(x+y) (x+y)(x-y)
=
.3 x-y