Tìm x biết: 2.(x+1)-3.(4-x)=7-4.(1-2x)

Cho đa thức: \(f\left(x\right)=3x-x^2-7+x^3\)

\(g\left(x\right)=x^3+3x-2x^2-5\)

a) Tính \(Q\left(x\right)=f\left(x\right)-g\left(x\right)\)

b) Tìm tất cả các nghiệm của đa thức Q(x)

c) Tìm đa thức h(x) ở dạng thu gọn sao cho P(x)= h(x)-f(x) là 1 đa thức bậc 0

Dùng từ gợi ý viết thành câu hoàn chỉnh:

Road users should obey traffic rules strictly

Traffic rules .........................................................

Chọn đáp án đúng:

1)The boys ..................... home for lunch because they are planning to visit the hydro-power station (have not come/ do not come/ will not be coming/ is not coming)

2) We will go on hoilday with some friends of ................... (ours/ our/ us/ we)

3) Before moving to Ha Noi, my parents ........................ in Hai Phong (have lived/ lived/ live/ have been living)

4) My friend has decided to use ........................ electricity by using more solar energy instead (more/ less/ much/ fewer)

5) A new university ................... in my town in the near future ( is built/ will be built/ was built/ has been)

Chọn đáp án đúng:

They ................................ the used plastic bottles with water several times yesterday

A) washed B) is washed C) are washed D) were washed

Viết lại câu:

1) He stayed at home. He was sick. (because)

2) It was very cold. They went swimming. (but)

3) We can go camping. We can go for a picnic. (or)

4) He had a stomachache. He didn't wash his hands. (so)

5) He does more exercise. He is putting on weight. (because)