
3-2-1(練習)
Interactive Video
•
Education
•
8th Grade
•
Easy
余武蔚 余武蔚
Used 1+ times
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4 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將多項式 x² + 7x + 6 因式分解。
(x + 1)(x + 6)
(x + 2)(x + 3)
(x - 1)(x - 6)
(x - 2)(x - 3)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在使用十字交乘法分解 x² - 5x + 6 時,常數項 6 應分解成哪兩個數,使其相乘為 6 且相加為 -5?
1 和 6
2 和 3
-1 和 -6
-2 和 -3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將多項式 x² - 5x + 6 因式分解。
(x + 1)(x + 6)
(x + 2)(x + 3)
(x - 1)(x - 6)
(x - 2)(x - 3)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
使用十字交乘法分解多項式時,如果中間項的係數數值正確,但符號相反(例如,預期為 -5x 卻得到 5x),應該如何調整分解的數字?
將兩個分解數字的符號都改變。
只改變其中一個分解數字的符號。
重新選擇完全不同的分解數字。
將分解數字的絕對值改變。
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