b cần bài nào thế

Chụp rõ hơn tí đi cậu, mờ quá!

a: (x-4)(x+5)>0

=>x-4>0 hoặc x+5<0

=>x>4 hoặc x<-5

b: (2x+1)(x-3)<0

=>2x+1>0 và x-3<0

=>-1/2<x<3

c: (x-7)(3-x)<0

=>(x-7)(x-3)>0

=>x>7 hoặc x<3

d: x^2+6x-16<0

=>(x+8)(x-2)<0

=>-8<x<2

e: 3x^2+7x+4<0

=>3x^2+3x+4x+4<0

=>(x+1)(3x+4)<0

=>3x+4>0 và x+1<0

=>-4/3<x<-1

f: 5x^2-9x+4>0

=>(x-1)(5x-4)>0

=>x>1 hoặc x<4/5

g: x^2+6x-16<0

=>(x+8)(x-2)<0

=>-8<x<2

h: x^2+4x-21>0

=>(x+7)(x-3)>0

=>x>3 hoặc x<-7

i: x^2-9x-22<0

=>(x-11)(x+2)<0

=>-2<x<11

l: 16x^2+40x+25<0

=>(2x+5)^2<0(loại)

m: 3x^2-4x-4>=0

=>3x^2-6x+2x-4>=0

=>(x-2)(3x+2)>=0

=>x>=2 hoặc x<=-2/3

2575+37-2576-29

= [2576-2575] +[37-29]

= 1+8

=9

Today, most children can go to school, so they all have to fulfill their responsibility to study well. Each child should choose a subject to study, learn about that subject so that it will help himself or her in many things or needs of life.I will tell you about my favorite subject, and that is English. English is the most widely used language. Depending on how you calculate it, besides nearly 400 million native speakers, English is understood and / or spoken by 1-1.6 million people worldwide. With more than a quarter of the world's population using this language, someone is always speaking English.  English plays a very important role in life and work in the future, English has many uses, so it is widely used because it is an easy language to learn and has many benefits. Sometimes we learn English because of personal interests . English for education, for tourism, for careers . I learn English 2 hours a day. During that time, I researched knowledge online, did English exercises, and communicated with foreigners through English learning software. I study English 6 days a week because I love English. My dream is become to a translater . it will take a lot of time for learning and learning to fulfill this dream ucows. I will always try and persevere. I believe if I have a will, my dream will come true !

As a student, each of us has some favorite subjects. A favorite subject is something we can repeatedly read without getting bored. We are always on our toes to read our favorite subject. However, at school, we can see that some students perform well in all subjects. The count of such students is less. The majority of students have a favorite subject. Almost every student has a favorite subject. It does not matter if it has associated with academics or arts.

2 cj viết hay quá, e cảm ơn 2 cj nhìu :)) 

=(2575-2576)+(37-29)

= -1+8

=8-1

=7

ok nha bạn

sụt sùi; tấm tức, rưng rức, nức nở; tức tưởi

Nức nở, rưng rức, sụt sịt

Hok tốt !!!!!!!!!

những từ láy cùng nghĩ với từ thút thít là : nức nở, sụt sùi, sụt sịt, ti tí, rưng rức, hu hu, ...

   nhớ k cho mk nha

Bài nào ạ. Ảnh bị lỗi.