\(x^2-xy+2x-2y=\left(x^2-xy\right)+\left(2x-2y\right)=x.\left(x-y\right)+2.\left(x-y\right)=\left(x-y\right).\left(x+2\right)\)

1. I often look at the sky every afternoon. It's so beautiful !

2. It's so beautiful scenery. When i look at the sky, i think about my future and my past. I often send my feelings to the sky.

3. Yes, there are

4. Overcast when the weather is rainny

5. Yes, there are

1. A

2. B

3. C

4. A

5. C

B

cấu trúc: What's the matter with you?

b

are they  going to see

history

discussion

It's + time + since + S + last+ Ved + O

a

c