题目内容
(x+6)(x-6)=______,(-x+
)(-x-
)=______.
| 1 |
| 2 |
| 1 |
| 2 |
(x+6)(x-6)=x2-36;
(-x+
)(-x-
)
=(-x)2-(
)2
=x2-
.
故答案为:x2-36;x2-
.
(-x+
| 1 |
| 2 |
| 1 |
| 2 |
=(-x)2-(
| 1 |
| 2 |
=x2-
| 1 |
| 4 |
故答案为:x2-36;x2-
| 1 |
| 4 |
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