题目内容
化简:
(1)
=______;
(2)
=______;
(3)
=______;
(4)
=______.
(1)
3a2bc3 |
15a3bc |
(2)
x2-9 |
x-3 |
(3)
x2+2x+1 |
x2-1 |
(4)
4b2-a2 |
4b2-4ab+a2 |
(1)
=
;
(2)
=
=x+3;
(3)
=
=
;
(4)
=
=
.
故答案为
;x+3;
;
.
3a2bc3 |
15a3bc |
c2 |
5a |
(2)
x2-9 |
x-3 |
(x+3)(x-3) |
x-3 |
(3)
x2+2x+1 |
x2-1 |
(x+1)2 |
(x+1)(x-1) |
x+1 |
x-1 |
(4)
4b2-a2 |
4b2-4ab+a2 |
(2b+a)(2b-a) |
(2b-a)2 |
2b+a |
2b-a |
故答案为
c2 |
5a |
x+1 |
x-1 |
2b+a |
2b-a |
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