题目内容
计算:
(1)(5+
)(5
-2
)=______;
(2)(
+
)(
-
)=______.
(1)(5+
| 6 |
| 2 |
| 3 |
(2)(
| 2 |
| 3 |
| 3 |
| 2 |
(1)原式=25
-10
+10
-6
=19
;
(2)原式=(
)2-(
)2=3-2=1.
故本题答案为:19
;1.
| 2 |
| 3 |
| 3 |
| 2 |
| 2 |
(2)原式=(
| 3 |
| 2 |
故本题答案为:19
| 2 |
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