chứng minh các biểu thức sau có giá tị dương với mọi x D=x mũ 2 + x +1 E = 3 x mũ 2 -5x +3

Vẽ anine full mn ơii Đừng vẽ qua loa nha

giả sử phương trình x ³ - x ² +ax +b =0 có 3 nghiệm phân biệt x1,x2,x3. Chứng minh a ² + 3b >0 giúp tôi với

Cho đa thức: f(x)=x^6 - 2011x^5 + 2011x^4 -2011x^3 + 2011x^2 - 2011x + 2016 f(2010)= bao nhiêu

Làm giúp em với ạ em cho ctlhn gấp lắm ạ

giải giúp mình câu b và c với ạ

câu 122 : Khai triển hằng đẳng thức : 1) (2x^5+x)^2-4/9 2)y^2 - 16 (x+1)^2 đừng viết tắt nha các bn mik cảm ơn

1. I bought a book last week. It was written by Hoang Cong Danh ⇒ The book 2. My mom introduced to me a girl last month. She is my boss ⇒ The girl 3. I am listening to a song. It was song by My Tam. ⇒ 4. My sister told me about a boy. He robbed the local bank yesterday ⇒ 5. I have read a novel many times is really meaning and moving ⇒

1 He asks his wife, "What does the doctor say?" ->He asks_____________________________________________________________ 2 "Where did you spend your holidays last year?" she asked me. ->She asked me________________________________________________________ 3 "I am reading a newspaper now". ->He said that__________________________________________________________ 4 "I don't know what you are talking about," Linda told Tom. ->Linda told Tom that she________________________________________________ 5 'Can I borrow your bike, Nga?', Nam asked. ->Nam asked Nga______________________________________________________ 6 He told his customer : “ Please bring it back if it doesn’t fit well” ->He told_____________________________________________________________ 7 "Don't make so much noise," he says. ->He asks us___________________________________________________________ 8 "Be careful, Ben," she said. ->She told Ben_________________________________________________________ 9 “ Shut the door but don’t lock it”, he said to me. ->He told._____________________________________________________________ 10 "Peter, do you prefer tea or coffee?" she says. ->She asks Peter________________________________________________________ 11 Mai said “It is raining heavily outside .” ->Mai said____________________________________________________________ 12 “Could you help me with my English speaking, Ba” asked Minh. ->Minh told___________________________________________________________ 13 "Have you been shopping?" he asked us. ->He wanted to know____________________________________________________ 14 She asks me, "Are you from Viet Nam?" ->She asks me if________________________________________________________ 15 “How can I play the guitar?” asked the boy ->The boy wanted to know_______________________________________________ 16 "I will get myself a drink," she says. ->She says____________________________________________________________ 17 "Why don't you go out for a while to relax?", John asked me. ->"lf _____________________________________", John said to me. 18 "My close friend and I had a quarrel last week, so I felt sad.", said Mary. ->Mary said___________________________________________________________ 19 “You’ve passed your driving test, David! Well done!” said Anna. ->Anna_______________________________________________________________ 20 “Can you lend me some money? “ Henry said to Susan. ->Henry______________________________________________________________ 21 “Don’ t swim out too far, boys ’’ I said ->I warned____________________________________________________________ 22 "Please turn down the radio for me," Said my father ->My father asked______________________________________________________ 23 "We are waiting for the school bus now", said the children. ->The children said_____________________________________________________ 24 "Why do I have to conduct this research?" she asked me. ->She asked me________________________________________________________ 25 My brother says to me, "When will you come?" ->My brother asks______________________________________________________

Giải giúp mình với mình đang cần gấp lắm ạ