6 How do they travel to work?

7 Who speaks French very well?

8 What makes people different from all other animals?

IV

1 Because Nathan missed the bus, he was late for school

2 Keep the food covered or the flies will contaminate it

3 Julie hadd a guitar and she plays it very well

4 I need to study hard so I can get a good score on the test

5 Although he seemed a friendly person, I didn't like him

6 The food looks delicious but it tastes horrible

7 Mason fell because the floor was wet

8 Anna needed some money so she took a part-time job

1/ Nathan missed the bus because he was late for school.

2/Keep the food covered or the flies will contaminate it.

3/Julie has a guitar and she play it very well.

4/I need to study hard so I can get a good score on the test.

5/Although he seemed a friendly,I didn't like him.

6/The food looks deliciou but it tastes horribie.

7/ Mason fell because the floor was wet.

8/Anna took a part-time job so she needed some money.

Bài 1:

a. $=2x(x-3)$

b. $=x^3(x+3)+(x+3)=(x^3+1)(x+3)=(x+1)(x^2-x+1)(x+3)$

c. $=64-(x^2-2xy+y^2)=8^2-(x-y)^2$

$=(8-x+y)(8+x-y)$

Bài 2:

$(x+5)(x+1)+(x-2)(x^2+2x+4)-x(x^2+x-2)$

$=x^2+6x+5+(x^3-2^3)-(x^3+x^2-2x)$

$=x^2+6x+5+x^3-8-x^3-x^2+2x$

$=8x-3$

Ta có đpcm.

Bài 4:

$P=a^3+a^2c-abc+b^2c+b^3$

$=a^2(a+c)-abc+b^2(b+c)$

$=a^2(-b)-abc+b^2(-a)=-a^2b-abc-b^2a$

$=-ab(a+c+b)=-ab.0=0$

khó quá

-Chị gái tôi đánh phấn rất xinh.

- Tôi đánh một giấc ngủ tới sáng .

Mình đánh hơi lỗi xíu, yhoong cảm nha, cái giúo là giúp đó. Các bạn có đ/á nhanh thì mình k nha

yhoong cảm là thông cảm nha, hihi, mình xin lỗi vì mình đang gấp