Ôn tập hè (Toán 8 KNTT-Chương II)
8th Grade
•36 Qs
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Ôn tập hè (Toán 8 KNTT-Chương II)
Quiz
•
Mathematics
•
8th Grade
•
Hard
Thành Danh Ngô Nguyễn
Used 2+ times
FREE Resource
36 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Câu 20: Tìm x biết (3x−1)2+2(x+3)2+11(1+x)(1−x)=6
A. x = -4
B. x = 4
C. x = -1
D. x = -2
A
B
C
D
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Câu 23: Tìm giá trị lớn nhất của biểu thức Q=8−8x−x2
A. 8
B. 11
C. -4
D. 24
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Câu 7: Khai triển (3x−4y)2 ta được
A. 9x2−24xy+16y2
B. 9x2−12xy+16y2
C. 9x2−24xy+4y2
D. 9x2−6xy+16y2
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Câu 12: Chọn câu đúng
A. 4−(a+b)2=(2+a+b)(2−a+b)
B. 4−(a+b)2=(4+a+b)(4−a−b)
C. 4−(a+b)2=(2+a−b)(2−a+b)
D. 4−(a+b)2=(2+a+b)(2−a−b)
A
B
C
D
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Câu 13: Rút gọn biểu thức A=(3x−1)2−9x(x+1) ta được:
A. -15x + 1
B. 1
C. 15x + 1
D. -1
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Câu 9: Biểu thức 1/4x2y2+xy+1 bằng:
A. (1/4xy+1)2
B. (1/2xy+1)2
C. (xy−1/2)2
D. (1/2xy−1)2
A
B
C
D
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Câu 19: Tìm x biết (x−6)(x+6)−(x+3)2=9
A. x = -9
B. x = 9
C. x = 1
D. x = -6
A
B
C
D
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