(4x-1)^2=25.9.

(2x-3)^3=125

3^x+2^x^3=144

5.5^x=625

7^6:7^x=49

3^2x + ^2=9^x+^3.

Bài 1: Một lít xăng giá 15 000 đồng. Lúc đầu giá xăng tăng 20%,sau đó giảm 10%. Hỏi sau khi tăng và giảm , giá một lít xăng là bao nhiêu?

b2: phân tích các đa thức sau thành nhân tử

a, x^2+4x-y^2+4

b, 2x^2+4xy+2y^2-8

c, x^2+x-6

(x:13+45).57=4275

846:[41-(7x-5)]=47

3^x=1

6^2-(2x-3)^2=0

b1 tìm x:

a, x(x-2)-7x+21=0

b, x^3+x^2+x+1=0

c,3-x-2(x-3)^2=0

`1) 12.(3-x)=0.

`2)` 2+x>2

`3)`

(x+65)-217=45

$\sqrt{2x-1}$

b1: phân tích các đa thức sau thành nhân tử:

a, x^2-y^2+3x-3y

b, x^2-2x-y^2+1

c, x^2(x-1)+16(1-x)

d, 4x^2-y^2+10y-25

12. He is attracted to ________________ women like her. (culture)
13. His interested are so ________________ that he never get bored. (diversity)
14. The company is trying to ________________ its products. (diversity)

8. They must be very ________________ to enter such a big competition. (confidence)
9. It is not a good idea to ________________ in a person like him. (confidence)
10. The story I told you is absolutely ________________. Don’t tell anyone. (confidence)
11. Your action last night was ________________ unsuitable in this country. (culture)

(5-x)(2-x)-4+x^2=0

20. We were very disappointed because of your ________________. (responsible)
21. You’re a grown man now. Try to live ________________ from now on. (responsible)
22. He would rather ________________ with other people at a club than stay at home alone. (social)
23. He has few friends because he is not very ________________. (social)

thế nào là chuỷen động đều?? cho em hỏi hấp ạ