
Khám Phá Hằng Đẳng Thức
Authored by Pham Thu
Mathematics
8th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hằng đẳng thức nào sau đây là đúng: (a + b)² = ?
a² + 2ab + b²
(a + b)(a - b)
a² - 2ab + b²
a² + b²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhận diện hằng đẳng thức: (x - y)² = ?
x² + 2xy + y²
x² - y²
x² - 2xy + y²
(x + y)²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Áp dụng hằng đẳng thức: Tính (3 + 4)².
49
64
25
36
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hằng đẳng thức nào sau đây là sai: (a + b)(a - b) = ?
Không có hằng đẳng thức nào sai trong trường hợp này.
(a + b)(a - b) = a^2 - b^2 - 2ab
(a + b)(a - b) = a^2 + b^2
(a + b)(a - b) = a^2 - b^2 + 2ab
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhận diện hằng đẳng thức: (x + 5)² = ?
x² + 5x + 10
x² + 25
x² + 10x + 20
x² + 10x + 25
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Áp dụng hằng đẳng thức: Tính (2x + 3)².
4x² + 12x + 9
4x² + 6x + 12
4x² + 6x + 9
2x² + 9x + 3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hằng đẳng thức nào sau đây là đúng: a² - b² = ?
(a - b)²
(a + b)²
a² + b²
(a - b)(a + b)
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