问题
解答题
计算: (1)-3mn÷
(2)
(3)
|
答案
(1)原式=-3mn•3m 2n2
=-
;9m2 2n
(2)原式=
•(x-1)2 (x+1)(x-1) x(x+1) x-1
=x;
(3)原式=-
•2(m-3) (m-2)2 (m+3)2 m-3
=-
.2(m+3)2 (m-2)2
计算: (1)-3mn÷
(2)
(3)
|
(1)原式=-3mn•3m 2n2
=-
;9m2 2n
(2)原式=
•(x-1)2 (x+1)(x-1) x(x+1) x-1
=x;
(3)原式=-
•2(m-3) (m-2)2 (m+3)2 m-3
=-
.2(m+3)2 (m-2)2