
Khám Phá Hằng Đẳng Thức
Authored by Chi Nguyen
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 + b²
a² - 2ab + b²
(a + b)(a - b)
a² + 2ab + b²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(x - y)² =
(x - y)² = x² + 2xy - y²
(x + y)² = x² + 2xy + y²
(x - y)² = x² - 2xy - y²
(x - y)² = x² - 2xy + y²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính giá trị biểu thức: (3 + 4)² - 2(3)(4) = ?
30
20
15
25
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tích đa thức: x² - 9 = ?
(x - 2)(x + 2)
(x - 4)(x + 4)
(x - 3)(x + 3)
(x - 1)(x + 1)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Áp dụng hằng đẳng thức để giải phương trình: x² - 16 = 0
x = 4, x = -4
x = 8
x = 0
x = -8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhận diện hằng đẳng thức: (a + b)(a - b) = ?
a^2 + b^2
a^2 - b
a^2 - b^2
ab
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giải phương trình bằng hằng đẳng thức: x² + 6x + 9 = 0
x = 0
x = -6
x = 3
x = -3
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