Maths problem: how to do, thanks?
回答 (1)
2020-07-31 8:51 am
✔ 最佳答案
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)
收錄日期: 2021-04-24 07:55:22
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