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-------------------------------------------|||||||||||||||||||||||||||||||||||||||||||||||||||||-------------------------------------------3x² - 8x + 4的因式分解是什麼?-------------------------------------------||||||||||||||||||||||||||||||||||||||||||||||||||||||-------------------------------------------

2006-01-18 16:22:56 · 4 個解答 · 發問者 changchih 7 in 科學 數學

4 個解答

(3x-2)*(x-2)
(3x-2)*(x-2)
(3x-2)*(x-2)
(3x-2)*(x-2)
(3x-2)*(x-2)
(3x-2)*(x-2)

2006-01-18 16:26:15 · answer #1 · answered by 小老鼠 7 · 0 0

好像是等級愈低ㄉ.
回答愈容易懂

2006-01-19 04:26:30 · answer #2 · answered by 事後諸葛 4 · 0 0

用十字交乘法

3x -2
 x- 2
-----------
-2x-6x=-8x

可得到3x^2-8x+4=(3x-2)(x-2)

2006-01-18 17:26:53 · answer #3 · answered by ? 3 · 0 0

用逆推的~
先算出 X=2 或 X=2/3 時為零...
就可以知道 (3x-2)*(x-2)=0
也就是因式分解!!!

2006-01-18 16:34:49 · answer #4 · answered by 知識 molecule 4 · 0 0

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