
Chi 21/7
Authored by Phan Đào
Geography
7th Grade
Used 2+ times

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51 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích của đơn thức x và đa thức (1 – x) là:
1-2x
x - x2
x2 - x
x2 + x
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tích của đa thức 4x5 + 7x2 và đơn thức (-3x3)
12x8 + 21x5
12x8 - 21x5
-12x8 + 21x5
-12x8 - 21x5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của biểu thức: x2(x+y) - y(x2 - y2) tại x = -6 và y = 8 là
296
297
298
295
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 3y2 - 3y(y-2) = 36. Giá trị của y là
5
6
7
8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thu gọn biểu thức (x-1)(x+1) - x2
-1
x + 1
1
x - 1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thu gọn biểu thức (x-2)(3x + 1) - (-3x + 2)(1-x).
Ta được
1
-4
2
0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hình chữ nhật có chiều dài lớn hơn chiều rộng là 5 đơn vị. Biểu thức tính diện tích hình chữ nhật là:
2x + 5
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