
Hằng Đẳng Thức Đáng Nhớ
Quiz
•
Mathematics
•
8th Grade
•
Hard
Đoan Khánh
Used 6+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Chọn câu sai?
A^3 + B^3 = (A + B)(A^2 - AB + B^2)
A^3 - B^3 = (A - B)(A^2 + AB + B^2)
(A - B)^3 = (B - A)^3
(A + B)^3 = (B + A)^3
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Viết biểu thức (x - 3y)(x^2 + 3xy + 9y^2) dưới dạng hiệu hai lập phương
x^3 + (3y)^3
x^3 - (9y)^3
x^3 + (9y)^3
x^3 - (3y)^3
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Viết biểu thức (3x - 4)(9x^2 + 12x + 16) dưới dạng hiệu hai lập phương
(3x)^3 - 163
9x^3 - 64
3x^3 - 43
(3x)^3 - 43
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Giá trị của biểu thức E = (x + 1)(x^2 - x + 1) - (x - 1)(x^2 + x + 1) là:
2
3
4
1
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Khai triển biểu thức sau x^3 + 64 ta được kết quả là
(x - 4) (x^2 + 4x + 16)
(x - 4) (x^2 + 4x -16)
(x + 4) (x^2 + 4x + 16)
(x + 4) (x^2 - 4x + 16)
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Khai triển biểu thức sau 8x^3 - 27 ta được kết quả là
(2x -3 )( 4x^2 - 6x + 9)
(2x -3 )( 4x^2 + 6x - 9)
(2x -3 )( 4x^2 + 6x + 9)
(2x +3 )( 4x^2 + 6x + 9)
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Rút gọn biểu thức: (x -2)^3 + (x+1)^3
2x^3 - 3x^2 - 15x - 7
2x^3 - 3x^2 + 15x - 7
- 2x^3 - 3x^2 + 15x - 7
- 2x^3 - 3x^2 - 15x - 7
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