anh ơi, anh giải thích cho em chỗ tại sao t1<-1, t2>1 thì f(-1) và f(1) <0 với ạ. huhu em cảm ơn nh lắm ạ

m = +- 5

3 hoặc -3 đúng zồi đó

222 + 333 = 555

k giùm mình  với

nhớ kb nha

1 x= -3

2 x=6

3 x=0

giao hoán

phân phối

kết hợp,kết đê,tớ đầy rồi

1.She is so selfish,so we don't like her

If she weren't so selfish, we would like her.

2.If you didn't speak quickly,I cou;d understand you

Unless you spoke quickly, I could understand you.

3.Hurry up or we will miss the bus

If we don't hurry up, we will miss the bus.

4.Do the test carefully or you may get bad mark

If you don't do the test carefully, you may get bad mark.

5.Uncles Nga hurries,she will mis the last train

If Nga doesn't hurry, she will miss the last train.

6.Mary doesn't buy this shirt because she doesn't have enouugh money

If Mary had enough money, she would buy this shirt.

7.Tom eats too much,so he gets fat

If Tom didn't eat too much, he wouldn't get fat.

8.I am not free today,so we can't go to the beach

We could go to the beach if i were free today.

9.It's rainy,so the children can't go swimming

The children could go swimming if it weren't rainy.

10.Give him some advice or he won't know what to do

If you give him some advice, he will know what to do.

11.He will get wet unless he puts the raincoat on

If he doesn't put the raincoat on, he will get wet.

12.We don't buy a lot of new books because we don't have a lot of money

We would buy a lot of new books if we had a lot of money.

We haven't come back to england for a year
=> It's a year since we came back England.

trong violympic 13 la dung

\(123+x.2=789\)

\(x.2=789-123\)

\(x.2=666\)

\(x=666:2\)

\(x=333\)