Giải phương trình:

a)\(\sqrt{2}x-\sqrt{50}=0\)

b)\(\sqrt[3]{x+1}=2\)

c)\(\sqrt{\left(x-3\right)^2}=3-x\)

d)\(\sqrt{2x+5}=\sqrt{1-x}\)

e)\(|x^2-1|+|x+1|=0\)

f)​\(|3x^{ }+1|=|x+1|\)​​v

\(|x^2-1|+|x+1|=0\)​

Hãy sắp xếp những câu sau thành hai bài hội thoại hợp lí:

No problem. i'll help you.

Could you do me a favor, please?

Thank you. i'm sure i'll find it.

Do you need my help?Thank you very much. That's very kind of you.
Certainly. Go ahead. Take the second turning on the left. It's on the way.

Sure. What can i do for you?

Yes. Could you show me to the nearest bus-stop?
Can you help me remove this motorbike? It's on the way.

Cho \(\dfrac{x}{2}= \dfrac{y}{5}=\dfrac{z}{7}. \)

Tính giá trị biểu thức A= \(\dfrac{x-y+z}{x+2y-z}\)

Giúp mình với nha

(1-2x)³ = -8

Giúp mình với nha