Bài tập ôn lớp 9 Đại số
Quiz
•
Mathematics
•
8th - 9th Grade
•
Practice Problem
•
Hard
Bich Tran
Used 7+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bài 1: Khai triển 4x2 – 25y2 theo hằng đẳng thức ta được
A. (4x – 5y)(4x + 5y)
B. (4x – 25y)(4x + 25y)
C. (2x – 5y)(2x + 5y)
D. (2x – 5y)2
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bài 2: Cho P = -4x2 + 4x – 2. Chọn khẳng định đúng.
A. P ≤ -1
B. P > -1
C. P > 0
D. P ≤ - 2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bài 3: Phương trình nào sau đây là phương trình bậc nhất một ẩn?
A. (x – 1)2 = 9
B. x2 - 1 = 0
C. 2x – 1 = 0
D. 0,3x – 4y = 0
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Bài 4: Phương trình: (4 + 2x)(x – 1) = 0 có nghiệm là:
A. x = 1; x = 2
B. x = -2; x = 1
C. 2x – 1 = 0
D. x = 1; x = 4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bài 5: Biểu diễn tập nghiệm của bất phương trình x ≥ 8 trên trục số, ta được
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bài 6: Tìm x để phân thức trên không âm?
A. x > 3
B. x < 3
C. x ≤ 3
D. x > 4
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bài 7: Hãy chọn câu đúng, x = -3 là một nghiệm của bất phương trình?
A. 2x + 1 > 5
B. 7 - 2x < 10 - x
C. 2 + x < 2 + 2x
D. -3x > 4x + 3
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