
toán 8
Authored by huyen phan
Mathematics
1st - 2nd Grade
Used 2+ times

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36 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rút gọn biểu thức: P =5xy – (-4xy +3x)
-9xy +3x
2xy – 3x
9xy +3x
9xy-3x
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khai triển (2x – 3)2 ta được
4x2 – 12y + 9
4x2 – 12y - 9
4x2 – 12yx + 9
4x2 – 12x+ 9
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu đúng
A + B)3 = A3 + 3A2B + 3AB2 + B3
A - B)3 = A3 - 3A2B - 3AB2 - B3
A + B)3 = A3 + B3
A - B)3 = A3 - B3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả của phép tính -4x2(6x3 + 5x2 – 3x + 1) bằng
24x5 + 20x4+12x3 – 4x2
24x5 – 20x4 +12x3 + 1
-24x5 – 20x4 +12x3 – 4x2
24x5 – 20x4 – 12x3 + 4x2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
> Rút gọn biểu thức B = 3(a + 1) – (3a +3) + 1 ta được
-2
1
2
-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
So sánh A = 2017(a + 1) và B = 2017a (với a > 0)
A< B
A ≥B
A = B
A > B
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Viết biểu thức x3 + 12x2 + 48x + 64 dưới dạng lập phương của một tổng
(x + 4)3
(x - 4)3
(x –8)3
(x +8)3
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