user-avatar
congtanshisui
2 năm trước
Nhận ctlhn liền tay nào 1. Cho P=2x(x+y-1)+y^2+1 a,Tính giá trị của P tại x=-2,y=1/2 b,C/m P luôn > hoặc bằng 0 vs mọi x,y 2.Cho P(x)=2x^2- |x-2 |-(2x^2-3x+1) a,Thu gọn P b,Tính giá trị của P tại x=-2 c,Tìm x để P=3 3. Cho x-y+z=0.C/m xy+yz-xz>hoặc bằng 0
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

They asked "where's your school?" →They asked us "Where will he go tomorrow?" →Bill asked me "When did you pick Ann up?" →Bill asked her "When will the teacher get back ?" →Mary asked me Ann said ,"What do you call a person who makes and repairs things of iron ,jane?" →Ann asked Jane She said ,"How do you go to the circus?" She asked me The traveller asked"How long does it take to get to london?" →The traveller asked her Mr.smith said to me "where are you doing on your vacation ?" →Mr.smith asked me William said "I won't visit her again →William said that John said "I have finished studying my lesson" →John said Mary said "I can't go to the movies with you ,John" →Mary told John He asked me "Why didn't you come to class yesterday?" →He asked me She wanted to know,"How long will it take me to get there?" →She asked me She asked him "Have you read this book?" →She asked him He askedme "who is the girl over there?" →He asked me "Did you phone me yesterday ?"Tom asked Mary →Tom asked Mary "Do you know how far the swimming pool is ?"I asked Mary →Iasked Mary "Do you like this" →He asked me "I didn't know them?"She asked She asked Tom "I usually get up much earlier than you do ,Tom" →Mary told tom "where is my umbrella?" She asked →She asked me He asked "Do I have to do it?" →He asked me "where have you been?" →THe mother asked her daughter "Which dress do you like best?" →She asked her boyfriend "What are they doing ?"She asked →She asked him " are you doing to the cinema ?"HE asked me →He asked me The teacher asked "Who speaks English?" →The teacher asked his students

VII. Rewrite the following sentences without changing the meaning, using the word given 3. Children in the slums have more diseases than those in wealthy areas. (fewer) ___________________________________________________________________________ 4. People in Crystal earn less than people in Vietnam. (more) ___________________________________________________________________________ VIII. Complete each of the following sentences with the words or phrases given 1. festivals / good / for / community /. ___________________________________________________________________________ 2. we / used / school / on / foot. ___________________________________________________________________________ 3. earth's / fossil / fuels / running / out /. ___________________________________________________________________________ 4. energy / from / sun / be / clean/ cheap / safe /. __________________________________________________________________________ 5. we / looking / for / alternative / sources / energy /.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team