问题
填空题
直接写出化简结果: (1)
(2)
(3)
(4)
(5)
(6)
|
答案
(1)原式=
1 |
4x |
(2)原式=
a |
b |
(3)原式=
x-y |
(x-y)2 |
1 |
x-y |
(4)原式=
a(x+y) |
(x-y)(x+y) |
a |
x-y |
(5)原式=
(x-4)(x+4) |
(x+4)2 |
x-4 |
x+4 |
(6)原式=
(x-3)(x+3) |
2(x+3) |
x-3 |
2 |
故答案为
1 |
4x |
a |
b |
1 |
x-y |
a |
x-y |
x-4 |
x+4 |
x-3 |
2 |