更新1:
謝謝"雨後陽光"解答及十多位"知識友們"贊助,Thanks!
中二算術 Math
回答 (1)
2011-11-05 10:42 am
✔ 最佳答案
(x - 1) (x - 2) (x - 3) (x - 4) - 48= (x - 1) (x - 4) (x - 2) (x - 3) - 48
= (x² - 5x + 4) (x² - 5x + 6) - 48
= (x² - 5x + 5 - 1) (x² - 5x + 5 + 1) - 48
= (x² - 5x + 5)² - 1² - 48
= (x² - 5x + 5)² - 49
= (x² - 5x + 5 - 7) (x² - 5x + 5 + 7)
= (x² - 5x - 2) (x² - 5x + 12)
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