Kiểm tra Toán 8A1 (HK1) lần 1
Quiz
•
Mathematics
•
6th - 8th Grade
•
Hard
Nguyễn Cang Trường
Used 4+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thu gọn đa thức 3y(x2 - xy) - 7x2 (y + xy) ta được
4x2y + 3xy2 – 7x3y
4x2y – 3xy2 – 7x3y
– 4x2y – 3xy2 – 7x3y
– 4x2y – 3xy2 + 7x3y
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích ( x- y)(x + y) có kết quả bằng
x2– 2xy + y2
x2+ y2
x2– y2
x2+ 2xy + y2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thương của phép chia (-12x4y + 4x3 – 8x2y2) : (-4x2) bằng
3x4y + x3– 2x2y2
-12x2y + 4x – 2y2
3x2y – x + 2y2
-3x2y + x – 2y2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khai triển biểu thức sau x3 + 64 ta được kết quả là
(x - 4) (x2 + 4x + 16)
(x - 4) (x2 + 4x -16)
(x + 4) (x2 + 4x + 16)
(x + 4) (x2 - 4x + 16)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn câu đúng
(c + d)2– (a + b)2= (c + d + a + b)(c + d – a + b)
(c – d)2– (a + b)2= (c – d + a + b)(c – d – a + b)
(c – d)2– (a – b)2= (c – d + a – b)(c – d – a – b)
(a + b + c – d)(a + b – c + d) = (a + b)2– (c – d)2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của biểu thức x3 – 6x2y + 12xy2 – 8y3 tại x = 2021 và y = 1010 là:
1
2
3
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của biểu thức A = (x2 – 3x + 9)(x + 3) – (54 + x3)
27
-27
54
-54
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