Rewrite these sentences:

1. If it hadn't raibed, we would have a better crop

=>But for............

2. Leave me alone or I'll call call the police

=> Unless.........

3. You must tell me the whole truth or I won't help you

=> Unless................

4. Don't tell lies to your boss or you'll be fine at one

=>If..............

5. Nam's sister sent him money, so he continued to study

=> But for.........

1. Chuyển sang câu ước:

Nga may make a lot of mistakes

=> I wish ............

2. Chủ động => bị động:

+) They have to pay the bill before the first of the month

=>

+) They have not used that machine for ages

=>

+) I want you to do this work nơ

=>

+) He shouldn't do that silly thing

=>

A = \(\left[\left(\sqrt{\dfrac{a}{b}}-1\right)\left(\sqrt{\dfrac{b}{a}}+1\right)\right]:\left(\dfrac{a}{b}-\dfrac{b}{a}\right)\)

a, Rút gọn A

b, Cho b = 1. Tìm a để A = 2

Kết quả của phép tính 88 x 11 là:

Giải các phương trình sau:

a) 2 2 x + 1 + x 4 x 2 − 1 = 7 2 x − 1 ;

b)  x 2 + 5 25 − x 2 = 3 x + 5 + x x − 5 .