Bài 3.1. Hằng Đẳng Thức 1,2,3
8th Grade
•10 Qs
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Bài 3.1. Hằng Đẳng Thức 1,2,3
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
Dung Trần
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10 questions
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Điền vào chỗ trống để được hằng đẳng thức đúng (A - B)2 = A2 … + B2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Viết biểu thức (x + 5)2 dưới dạng đa thức thu gọn ta được kết quả là
x2 + 10x + 25
x2 - 10x + 25
x2 - 25
x2 + 25
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu đúng.
(A - B)(A + B) = A2 + 2AB + B2
(A + B)(A - B) = A2 - B2
(A + B)(A - B) = A2 - 2AB + B2
(A + B)(A - B) = A2 + B2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả phép tính 1972 + 6.197 + 32 là
40000
4000
400
37636
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rút gọn biểu thức
A = (3x – 1)2 – 9x2 - 9x ta được
-15x + 1
1
15x + 1
– 1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biểu thức 4x2 - 4x + 1 được viết dưới dạng hằng đẳng thức bình phương của một hiệu là
(2x - 1)2
(2x + 1)2
(4x - 1)2
(2x - 1)(2x + 1)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả của phép nhân (2x - 7y)(2x +7y) là
2x2-7y2
2x2 + 7y2
4x2 - 49y2
4x2 + 49y2
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