题目内容
计算:
+
.
| x2+6x |
| x2+2x |
| x2-4 |
| x2+4x+4 |
原式=
+
=
+
=
=2.
| x(x+6) |
| x(x+2) |
| (x+2)(x-2) |
| (x+2)2 |
=
| x+6 |
| x+2 |
| x-2 |
| x+2 |
=
| 2(x+2) |
| x+2 |
=2.
练习册系列答案
相关题目
题目内容
| x2+6x |
| x2+2x |
| x2-4 |
| x2+4x+4 |
| x(x+6) |
| x(x+2) |
| (x+2)(x-2) |
| (x+2)2 |
| x+6 |
| x+2 |
| x-2 |
| x+2 |
| 2(x+2) |
| x+2 |