题目内容
计算:(lg5)2+lg2lg5+lg2+(
)
- (
)2的值.
| 27 |
| 8 |
| 2 |
| 3 |
| 3 | 8 |
∵(lg5)2+lg2•lg5+lg2+(
)
-(
)2
=lg5(lg5+lg2)+lg2+(
)3×
-22
=lg5+lg2+
-4
=-
.
| 27 |
| 8 |
| 2 |
| 3 |
| 3 | 8 |
=lg5(lg5+lg2)+lg2+(
| 3 |
| 2 |
| 2 |
| 3 |
=lg5+lg2+
| 9 |
| 4 |
=-
| 3 |
| 4 |
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