唔識做功課22

圖片參考：https://s.yimg.com/lo/api/res/1.2/ZQit8r6YM3UMER1bF6V.OQ--/YXBwaWQ9dHdhbnN3ZXJzO3E9ODU-/http://i.imgur.com/ZH9B85L.gif

哈哈哈，呢個《唔識做功課》系列繼續：

Factorize the following polynomials if possible

a) x² - 7x + 10 = (x - 2)(x - 5)

b) x² - 10 - 3x = x² - 3x - 10 = (x - 5)(x + 2)

c) x² + 7x + 6 = (x + 1)(x + 6)

d) x² - 5x - 6 = (x - 6)(x + 1)

e) x² - x - 6 = (x - 3)(x + 2)

f) x² - x + 6 cannot be factorized.
If the question is x² + x - 6, then x² + x - 6 = (x + 3)(x - 2)

g) 2a² - 24a + 36
= 2(a² - 12a + 18)
= 2(a² - 12a + 36 - 18)
= 2[(a - 6)² - (3√2)²]
= 2(a - 6 + 3√2)(a - 6 - 3√2)

這里很不錯ａaａｓhｏｐs。cｏｍ老婆很喜歡
公吔