`2. C`

`3. C`

`4. A`

`5. B`

`6. B`

`1` The art museum is the most interesting place in this city.

`2` I am not as tall as you.

`3` Ann doesn't work as hard as she was.

`4` My salary isn't as high as yours.

`5` You don't know as much as me about cars.

đr nha

`369^3-219^3`

`=(3.123)^3-(3.73)^3`

`=3^3 . 123^3-3^3 . 73^3`

`=3^3(123^3 - 73^3)`

`=27(123-73)(123^2 - 123.73+73^2)`

`=27.50(123^3 +123.73+73^2)`

`=1350(123^3 +123.73+73^2)` ⋮ `1350` (đpcm)

`a, (24, 10) = 2`

`b, (8, 12, 15) = 1`

`2020 equiv 1 ( mod 3)`

`-> 2020^2021 equiv 1^2021 equiv 1 ( mod 3)`

`2021 equiv 2(mod 3)`

`-> 2021^2020 equiv 2^2020 equiv 2 ( mod 3)`

`-> 2020^2021 + 2021^2020 equiv 3 ( mod 3)`

`-> A vdots 3`

`23`. more difficult

`24`. more interesting/less boring

`25`. more expensive

`26`. faster/more careful

`27`. more expensive

`28`. longest

`29`. as pretty

`30`. more expensive

Ko đăng lại nhé.