
BÀI 9
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
newsky toan8
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu trả lời đúng nhất: x^2y^2z+xy^2z^2+x^2yz^2+x^2yz^2
A. x(xy^2z + y^2z^2 + xyz^2)
B. y(x^2yz + xyz^2 + x^2z^2)
C. z(x^2y^2 + xy^2z + x^2yz)
D. xyz(xy + yz + xz)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 4a^2(x + 1)−7bx−7b =(x + 1)(...). Biểu thức thích hợp vào dấu ... là
A. 4a^2−b
B. 4a^2+7b
C. 4a^2−7b
D. 4a^2+b
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tích đa thức thành nhân tử: x^2+6x+9
A. (x+3)(x−3)
B. (x−1)(x+9)
C. (x+3)^2
D. (x+6)(x−3)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả phân tích đa thức x^2−xy+x−y thành nhân tử là
A. (x+1)(x−y)
B. (x−y)(x−1)
C. (x−y)(x+y)
D. x(x−y)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu sai.
A. (x−1)^3+2(x−1)^2=(x−1)^2(x+1)
B. (x−1)^3+2(x−1)=(x−1)[(x−1)^2+2]
C. (x−1)^3+2(x−1)^2=(x−1)[(x−1)^2+2x−2]
D. (x−1)^3+2(x−1)^2=(x−1)(x+3)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nhân tử chung của biểu thức 30(4−2x)^2+3x−6 có thể là
A. x + 2
B. 3(x – 2)
C. (x−2)^2
D. (x+2)^2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tích đa thức x^2−2xy+y^2−81 thành nhân tử:
A. (x−y−3)(x−y + 3)
B. (x−y−9)(x−y + 9)
C. (x+y−3)(x+y + 3)
D. (x+y−9)(x+y−9)
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