题目内容
计算:
(1)
•
=______;
(2)
÷(6xy2)=______;
(3)
•
=______;
(4)
÷
=______;
(5)(ab-b2)÷
=______.
(1)
n2 |
5m3 |
10m |
2n |
(2)
3xy |
4a |
(3)
4 |
a2-1 |
a-1 |
6a |
(4)
x2-y2 |
x |
x-y |
x2+xy |
(5)(ab-b2)÷
a2-b2 |
a+b |
(1)原式=
;
(2)原式=
•
=
;
(3)原式=
•
=
=
;
(4)原式=
•
=(x+y)2=x2+2xy+y2;
(5)原式=b(a-b)•
=b.
故答案为
;
;
;x2+2xy+y2;b.
n |
m2 |
(2)原式=
3xy |
4a |
1 |
6xy2 |
1 |
8ay |
(3)原式=
4 |
(a+1)(a-1) |
a-1 |
6a |
2 |
3a(a+1) |
2 |
3a2+3a |
(4)原式=
(x+y)(x-y) |
x |
x(x+y) |
x-y |
(5)原式=b(a-b)•
a+b |
(a+b)(a-b) |
故答案为
n |
m2 |
1 |
8ay |
2 |
3a2+3a |
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