因式分解 (恆等式) | Factorization by Identities

影片內容:

00:34 – 重溫幾個重要的恆等式 | review of some important identities
01:30 – 平方差 | difference of two squares
03:53 – 完全平方 | perfect square
08:28 – 立方和及立方差 | sum and difference of two cubes

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