Tìm x biết

3.|x-2| - |-9| = 12

6(x- 2) - (x-3) = 31

Cho tam giác ABC vuông ở C có góc A = 60 độ. Tia phân giác của góc BAC cắt BC ở E. Kẻ EK vuông góc AB ( K thuộc AB ). Kẻ BD vuông góc với tia AE. CM :

a) AE vuông góc với CK

b) KA = KB

c) EB > AC

d) AC, BD, KE cùng đi qua 1 điểm

Finish the second sentence in each pair, so that it has similar meaning to the first one, using the beginning given.

1. Why don't you star to run and see if that helps you to lose weight?

=> You should...............................................................

2. They have chosen John for the school's football team.

=> John has...................................................................

3. It is very noisy in the city but we enjoy living there.

=> Although.........................................................

4. The failure of the team caused us great disappointment.

=> We were.......................................................

5. The guide speaks too quickly for me to understand.

=> The guide doesn't...........................................

Tìm x, biết

a) 3(x-1)^2 = 27

b) 5/x-2/+10= 25

d) 3(x-2) -\(\dfrac{1}{3}\)(x-4) = 0

Mistake

1. I'd like having a cup of tea after dinner.

........................=>.............................

2. My brother likes playing soccer a lot and I like,too.

.......................=>.........................

3. I don't take many money on me. I'm afraid of losing it.

.......................=>........................

4. I know that man very good.

.......................=>.....................

Cho tam giác ABC có góc B = 60 độ. Hai tia phân giác AD và CE cắt nhau ở điểm O. Chứng minh:

a) Tam giác AOE = tam giác AOK ( K thuộc AC sao cho AE = AK )

b) OE=OK=OD