1 個解答
評分
- 知足常樂Lv 76 月前最愛解答
早晨。(◕‿◕✿)
(i) Write -8 as the difference of two square numbers:
-8 = 1 - 9 = 1² - 3²
(ii) Factorize the expression:
m² - 2m - 8
= m² - 2m + 1² - 3²
= m² - 2m(1) + 1² - 3²
= (m - 1)² - 3²
= [(m - 1) + 3] [(m - 1) - 3]
= (m + 2)(m - 4)
還有問題嗎？立即提問即可得到解答。