bài 1:

a) tìm điều kiện xác định  cảu biểu thức 3x-1/x^2-4

b) 2x(x-1)+3(x-1)=0 tìm giá trị của x

c) thêm một hạng tử để đa thức x^2y^4+16 là bình phương của một tổng

d) rút gọn phân thức x^2+2x+1/1-x^2

1. hoa is very sick.she can't sit up.

-Hoa is so..........................................

2.It was very dark, so she could'n go out.

-It was too..........................................

3. That car was too old for me to buy.

-That car was so..............................

4. The movie was so funny that we couldn't stop laughing.

-It was such............................................

5. No one could move tho piano.It was very heavy.

- The piano was too................................

6. We shouldn't swim in this river. the water isn't clean.

-This river isn't......................................

Khoanh vào câu trả lời đúng 

1: It was ........a boring speech that I felt asleep.

 A.such         B.so           C.very         D.too

2:Is there...........for everyone?

 A.food and drink enough                           B. enough food and drink

C. enough of food and drink                       D. enough food and drink enough

3: he was ....... he could not continue to work

 A.very tired that                B. such tired that          C. too tired that          D. so tired that     

Tìm x

a)x^2-10x=-25

b)3x(x-2)-x^2+2x=0

giúp mik vs ah