
truy bài 25/10 chiều
Quiz
•
Mathematics, English, Physics
•
1st Grade
•
Hard

Dung Cao Thị Thùy
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Kết quả -5x3.(5x2 +2x -3) bằng:
A. 25x5 – 10x4 -15x3
B. -25x5 – 10x4 +15x3
C. -25x5 + 10x4 +15x3
D. Tất cả đều sai
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Khai triển 4x2 – 25y2 theo hằng đẳng thức ta được
(4x – 5y)(4x + 5y)
(4x – 25y)(4x + 25y)
(2x – 5y)(2x + 5y)
(2x – 5y)2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích (2x – 3)(2x + 3) có kết quả bằng
4x2 + 12x+ 9
4x2 – 9
2x2 – 3
4x2 + 9
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu đúng. (x – 2y)3 bằng
x3 – 3xy + 3x2y + y3
x3 – 6x2y + 12xy2 – 8y3
x3 – 6x2y + 12xy2 – 4y3
x3 – 3x2y + 12xy2 – 8y3
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