![](https://img.kancloud.cn/d1/d9/d1d94195199301311b34fbee5cdb08b6_1237x722.png)
![](https://img.kancloud.cn/76/4d/764d52309e5c79702fbc10add057eda8_1440x805.png)
**a^3+b^3=(a+b)(a^2-ab+b^2)**
![](https://img.kancloud.cn/cc/5f/cc5fa73ea4ec757777663043ef0f83e7_1264x719.png)
![](https://img.kancloud.cn/6f/38/6f38d4fab1e0b68e18f4c6d480d64588_1517x814.png)
![](https://img.kancloud.cn/e6/0e/e60e30307ad66d9368f29201e947550b_1512x752.png)