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TOÁN 8C | TOFAS | T3 16/1/2024

Authored by Vinh Sư Phụ

Mathematics

8th Grade

Used 1+ times

TOÁN 8C | TOFAS | T3 16/1/2024
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Bậc của đa thức P = 2x2y – x3 + xy2 – 7.

3

2

1

7

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Tính tổng

P = 2x2y – x3 + xy2 – 7 và Q = x3 – xy2 + 2xy + 3x2y + 6.

5x2y – 1 + 2xy

5x2y – 1 - 2xy

-5x2y – 1 + 2xy

5x2y + 1 + 2xy

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Hệ số tự do của hiệu hai đa thức: P = 2x2y – x3 + xy2 – 7 và Q = x3 – xy2 + 2xy + 3x2y + 6.

11

-12

13

-13

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

M = 5x3 + 4x2y – 3x + y; N = 6xy + 3x – 2; P = 4x3 – 2x2y + 6x + 1. Hệ số chỉ chứa biến y của biểu thức M + N – P.

1

-1

-2

2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A – 6x2 + xyz = xy + 3x2 + 5xyz – 2. tìm đa thức A

xy + 9x2 + 4xyz – 2

xy + 9x2 - 4xyz – 2

-xy + 9x2 + 4xyz – 2

xy - 9x2 + 4xyz + 2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

(x – 2y)(x2 + 2xy + 4y2) =

x3 + 8y3

x3 – 8y3

-x3 – 8y3

-x3 + 8y3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

(2x – 1)2 – (2x + 1)2 =

8x

-8x

4x2 + 1

4x2 - 1

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