问题
解答题
计算: (1)(-2m2n-2)2•(3m-1n3)-3; (2)(
|
答案
(1)原式=4m4n-4•
m3n-91 27
=
m7n-134 27
=
;4m7 27n13
(2)原式=[
•a-(a-b) (a+b)(a-b) -(a-b) b
=
•b (a+b)(a-b) -(a-b) b
=-
.1 a+b
计算: (1)(-2m2n-2)2•(3m-1n3)-3; (2)(
|
(1)原式=4m4n-4•
m3n-91 27
=
m7n-134 27
=
;4m7 27n13
(2)原式=[
•a-(a-b) (a+b)(a-b) -(a-b) b
=
•b (a+b)(a-b) -(a-b) b
=-
.1 a+b