高階ODE怎麼分解

2014-05-18 6:32 am

r3 - 4r2 - 4r + 16 = 0

上式是怎麼轉換成下式的啊

→ ( r + 2 )( r - 2 )( r - 4 ) = 0

回答 (13)

2014-05-18 6:58 am

✔ 最佳答案

r^3 - 4r^2 - 4r + 16 = 0
==> (r - 4)r^2 - 4(r - 4) = 0
==> (r - 4)(r^2 - 4) = 0
==> (r - 4)(r + 2)(r - 2) = 0

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2014-06-05 2:06 pm

到下面的網址看看吧

▶▶http://candy5660601.pixnet.net/blog

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2014-06-03 2:56 pm

到下面的網址看看吧

▶▶http://candy5660601.pixnet.net/blog

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2014-05-29 4:00 pm

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2014-05-28 3:23 pm

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2014-05-27 11:58 am

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2014-05-24 12:56 pm

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2014-05-23 4:07 pm

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2014-05-19 9:53 am

中學時學的 "因式分解" 不要丟了啊!

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2014-05-18 8:59 am

>這家不錯*****買幾次啦真的一樣
侟亱哠

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