Bài 1:Tìm nghiệm

a)f(x)=3(x-1)-4

b)g(x)=2(x-1)+3(x+2)

c)h(x)=4x²+4x-1

d)k(x)=\(\dfrac{x-1}{2}\) +\(\dfrac{x-2}{3}\)+1

Bài2:tìm x, y, z

a) \(\dfrac{x}{2}\)=\(\dfrac{y}{3}\)=\(\dfrac{z}{-4}\) và x+y+z =-5

b)\(\dfrac{x}{3}\)=\(\dfrac{y}{2}\)=;\(\dfrac{y}{3}\)=\(\dfrac{z}{5}\) và x+y-2z=11

c)\(\dfrac{x+1}{2}\)=\(\dfrac{y-2}{3}\)=\(\dfrac{z+3}{4}\) và x+2y-z=-30

Cho góc xOy.Trên Ox lấy điểm A,trên Oy lấy điểm B sao cho OA=OB.Lấy m,n đều thuộc miền trong cửa góc sao cho MA=MB,NA=NB.Chứng minh:

a)OM là phân giác góc xOy

b)O,M,N thẳng hàng

c)MN là đuờng trung trực của AB

A sách VNen nè

Méo hiểu bạn nói j lun =_=

topic 1 At home and go out
where do you usually meet your friends?

what do you usually do with your friends?

what do you usually do when you go out ?

do you like eating at home or in the restaurant?why?

i would like to introduce myself. Hi my name is Đức , I'm 13 year old.I live in Trà Dương village. I studying at Tống Trân school. I'm grade 7 class 7A. My favorite subjects are English,Math and literature. I am an easy person to have many friends and other social relation ships. I'm confident, funny, I'm also a little shy. My hobby is
playing badminton, listenning to music, wathing action movies, reading comics or novels... I like to go out with my friends. We plays soccer, volleyall and go swimming. I hate durian and I'm afraid ghosts, there are 5 people in my family. my father,mother,two sister and me . My first sister is 24 year old, she is a worker. My second sister is 22 year old, she is also a worker. My father,My mother is a farmer. I love my family