Có : x^3-x^2+2x-8

= (x^3-2x^2)+(x^2-2x)+(4x-8) 

= (x-2).(x^2+x+4)

Tk mk nha

1. English is more interesting than music.

2. Today they are not as happy as they were yesterday.

3. Ha Noi is not as small as Hai Duong.

4. Mai's sister is not as pretty as her.

6. You have got more money than me.

7. Art is not as difficult as French.

8. Nam's father is more careful than him.

9. No one in our town is as rich as Mr Ron.

10. He is the most intelligent in my class.

11. Everest is the highest mountain in the world.

12. Minh is the fattest person in my group.

13. I can't swim as far as Jan.

14B 15C 16A 17C 18B 19C 20B

bạn có thể chụp thẳng đc hong?????

chịu

mình biết một trang có thể luyện thi violympic toán bất kể vòng nào . Bạn thử truy cập trang Luyện Thi Violympic xem sao nếu được thì k mình nha !

Nè sớm thứ 4 bạn rảnh không ?

nếu rảnh thì 8 :00 bật vào thi vòng 10 violympic 

rồi gửi mik đề thi đóa 

mik k cho

1  So embarrassing was the situation that she did not know what to do

2 Janet apologized to her employer for arriving late

3 Were you to change your mind, you’d be welcome to join us.

4 Hardly had the workers started working when the accident happened.

5 Nigel had better leave soon if he’s catching the 8.30 train

6 Bill apologized to Mary for interrupting her dinner.

7. I wish I had finished my home work at the weekend.

8 It takes Chi thirty minutes every day to do the shopping

9 Lan asked Binh where he was going on vacation the following summer

1. So embarrasing was the situation that she did not know what to do.

_{form: s + be + so + adj + that + s + v = so adj + be + that s + v: quá..đến nỗi mà.}

2. Janet apologized to her employer for her late arrival.

_{câu gián tiếp​}

3. Were you to change your mind, you would be welcome to join us.

4. Hardly had the workers started working when the accident happened.

5. Nigel had better leave soon if he’s catching the 8.30 train

Câu 5:

\(\dfrac{x}{y}=a\Rightarrow\dfrac{x}{a}=\dfrac{y}{1}=\dfrac{x-y}{a-1}=\dfrac{x+y}{a+1}\)

\(\Rightarrow\dfrac{x+y}{x-y}=\dfrac{a+1}{a-1}\)

Câu 6:

\(9x=5y\Rightarrow\dfrac{x}{5}=\dfrac{y}{9}\)

\(\Rightarrow\dfrac{x}{5}=\dfrac{y}{9}=\dfrac{3x}{15}=\dfrac{2y}{18}=\dfrac{3x-2y}{15-18}=\dfrac{12}{-3}=-4\)

\(\Rightarrow\left\{{}\begin{matrix}x=\left(-4\right).5=-20\\y=\left(-4\right).9=-36\end{matrix}\right.\)

Câu 7:

\(\dfrac{x}{-5}=\dfrac{y}{7}=\dfrac{x+y}{-5+7}=\dfrac{-10}{2}=-5\)

\(\Rightarrow\left\{{}\begin{matrix}x=\left(-5\right).\left(-5\right)=25\\y=\left(-5\right).7=-35\end{matrix}\right.\)

Cảm ơn bạn nhiều ạ!^^

trần anh hào

1 ngày làm được số sản phẩm là :
45 : 5 = 9 ( sản phẩm )
90 sản phẩm làm trong số ngày là :
90 : 9 = 10 ( ngày )

1 ngày làm được số sản phẩm là :

45 : 5 = 9 ( sản phẩm )

90 sản phẩm làm trong số ngày là :

90 : 9 = 10 ( ngày )

Đáp số : ...........

Bài 2: 

a: Ta có: Om là tia phân giác của \(\widehat{xOy}\)

nên \(\widehat{xOm}=\widehat{yOm}=\dfrac{180^0}{2}=90^0\)

Do đó: Om\(\perp\)xy

b: Ta có: \(\widehat{xOa}+\widehat{mOa}=90^0\)

\(\widehat{mOb}+\widehat{yOb}=90^0\)

mà \(\widehat{mOa}=\widehat{yOb}\)

nên \(\widehat{xOa}=\widehat{mOb}\)