
Khám Phá Hằng Đẳng Thức
Authored by Binh Tien
Mathematics
8th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hãy áp dụng hằng đẳng thức để tính giá trị của (a + b)².
a² + 2ab + b²
a² + b²
(a + b)³
a² - 2ab + b²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhận diện hằng đẳng thức nào sau đây: (x - y)² = x² - 2xy + y².
(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
Giải phương trình sau bằng hằng đẳng thức: x² - 16 = 0.
x = 4, x = -4
x = 8
x = -8
x = 0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chứng minh hằng đẳng thức: (a + b)³ = a³ + 3a²b + 3ab² + b³.
(a + b)³ = a² + b² + ab + 1.
(a + b)³ = a³ + 3a²b + 3ab² + b³.
(a + b)³ = a³ + 3ab + b³.
(a + b)³ = a³ + 2a²b + 2ab² + b³.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính giá trị biểu thức: 3² + 4² - 2(3)(4).
-1
0
1
5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tích đa thức: x² - 9 thành tích của hai đa thức.
(x - 1)(x + 1)
(x - 3)(x + 3)
(x - 4)(x + 4)
(x - 2)(x + 2)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hãy áp dụng hằng đẳng thức để tính giá trị của (x + 5)(x - 5).
x^2 + 25
x^2 - 25
x^2 - 10
x^2 + 5
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