问题 解答题
化简:
(1)
x2-x-2
x2-4
-
x2+2x
x2+2x+1

(2)(
3n
2m
)2÷(
m
2n2
)3
答案

(1)原式

(x-2)(x+1)
(x+2)(x-2)
x(x+2)
(x+1)2
(3分)=
1
x+1
;(4分)

(2)原式=(

n2
m2
)÷(
m3
n6
)=
n2
m2
×
n6
m3
=
18 n8
m5
.(4分)

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