factor p^2-8p-20?
回答 (5)
2008-07-07 8:39 am
✔ 最佳答案
p^2 - 8p - 20= p^2 + 2p - 10p - 20
= (p^2 + 2p) - (10p + 20)
= p(p + 2) - 10(p + 2)
= (p + 2)(p - 10)
2008-07-07 3:53 pm
p^2 - 8p - 20 = 0
p^2 - 10p + 2p - 20 = 0
p (p - 10) + 2 (p -10) = 0
(p+2) (p-10) = 0
p = -2, 10
p^2 - 10p + 2p - 20 = 0
p (p - 10) + 2 (p -10) = 0
(p+2) (p-10) = 0
p = -2, 10
2008-07-07 2:53 pm
(p - 10)(p + 2)
2008-07-07 2:51 pm
f
(p-10)(p+2)
(p-10)(p+2)
2008-07-07 2:48 pm
(p - 10)(p + 2)
收錄日期: 2021-05-01 10:46:46
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