
ÔN HÈ TOÁN 8 LÊN 9
Interactive Video
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Minh Nguyen
Used 1+ times
FREE Resource
7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Các hạng tử của đa thức A = x²y - 3xy - 3z + 2y gồm những hạng tử ?
x²y, 3xy, 3z, 2y
x²y, -3xy, -3z, 2y
x²y, -3xy, 3z, 2y
x²y, 3xy, -3z, 2y
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích của đa thức A và B là đa thức nào nếu A = x² - 3y B = -3z - 2y?
-3x²z + 9yz - 2x²y + 6y²
3x²z - 9yz + 2x²y - 6y²
-3x²z - 9yz - 2x²y - 6y²
3x²z + 9yz + 2x²y + 6y²
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
(2x + y)(2x – y) =
2x2 – y2
4x2 – y2
2x2 + y2
4x2 + y2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phân tích đa tức thành nhân tử đa thức C = x² + x - 2xy - y + y² là:
(x - y)(x + y + 1)
(x - y)(x - y + 1)
(x + y)(x - y + 1)
(x + y)(x + y - 1)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biểu thức nào tương đương với y - x?
x - y
-(x - y)
x + y
-x - y
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biểu thức nào sau đây tương đương với x² - 4x + 3 sau khi biến đổi thành phép tính bình phương?
(x - 2)² - 1
(x + 2)² - 1
(x - 4)² + 3
(x - 1)² + 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2x2y + 4xy =
2xy(x + 2)
2xy(x + 4)
2xy(2 + 44x
2xy(x + 4
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