\(\frac{5\sqrt{x}-2}{8\times\sqrt{x}+2,5}=\frac{2}{7}\)

\(\sqrt{3-x}-\sqrt{27+9x}+1,25\sqrt{48-16x}=6\)

\(\sqrt{49x-98}-14\sqrt{\frac{x-2}{49}=}3\sqrt{x-2}+8\)

Rút gọn

Bài 1: Phân tích đa thức thành nhân tử:

a) x 2 – y 2 – 5x + 5y

b) 2x2 – 5x – 7

Chuyển các câu sau sang dạng câu hỏi

Ex: This is my pen. Is this your pen?

1. This is my teacher.

2. That is my classmate.

3. This is my schoolbag.

4. That is my ruler.

5. This is my house.

Giúp mik vs nha