y x 134 - y x 24 - y x 10 = 710000

y x ( 134 - 24 - 10 )         = 710000

y x 100                            = 710000

y                                      = 7100

:))

y x 134 - y x 24 - y x 10 = 710000

= y x (134 - 24 - 10) = 710000

= y x 100 = 710000

y = 710000 : 100

y = 7100

làm nhanh mk k cho + kb luôn

Quãng đường em đã đi khi anh bắt kịp là :

        4 x ( 3 + 3 ) = 24 ( km )

Vận tốc của người anh là :

        24 : 3 = 8 ( km/h )

     :))

Circle the correct item

1.    A jewellery shop .....................last night.

A.    Was broken into                    B. has been broken into          C. had been broken into

2.    The flowers need ..........................once a day.

A.    Watering                                  B. be watered                         C. to water

3.    The omlette was made ..................mushrooms and cheese.

A.    By                                            B. with                                     C. from

4.    It was ................a boring film that he almost feel asleep.

A.    So                                            B. such                                   C. much

5.    A lot of olive oil ....................on the Greek island or Crete.

A.    Produces                                 B. is produced                       C. has produced

6.    I ...............that film four times already.

A.    See                                          B. have seen                          C. saw

7.    Two days ..................... a long time to wait.

A.    Isn’t                                         B. aren’t                                   C. hasn’t

8.    Her basket was filled ....................groceries.

A.    By                                            B. from                        C. with                       

9.    Romeo and Julliet .......................by William Shakespeare.

A.    Wrote                                      B. were written                        C. was written

10.  He cut the beard ..................a knife.

A.    With                                         B. by                                        C. of

11.  The building was designed ....................a Spanish architect.

A.    By                                            B. with                                     C. from

12.  ......................living in Germany for two years, Greg can speak very little German.

A.    While                                       B. Although                             C. Despite

13.  Even though he objects to violence, he was made ......................in the army.

A.    Serving                                    B. served                                 C. to serve

14.  David ...........................to be a very honest man.

A.    Is known                                  B. to be known                        C. knows

* Chưa chắc đúng đâu nhé !

1-a,2-c,3-a,câu 4 đã là sẵn câu trả lời rồi,xin lỗi mình chỉ biết thế thôi

\(x.\left(x^2+49\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x^2+49=0\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=0\\x^2=-49\left(L\right)\end{cases}}\)

Vậy \(x=0\)

Học tốt 

Bg

Điều kiện: x thuộc Z

x(x² + 49) = 0

=> x = 0 hoặc x² + 49 = 0

Với x² + 49 = 0

=> x² = 0 - 49

=> x² = -49

=> x² = 7² hay (-7)²

=> x = 7 hay -7

Vậy x = {0; 7; -7}

1. considered 

2. is made

3. is served 

4. is cut

5. are added

6. are found

7. is taken

8. belive

9. look

10. confuse 

11. is thought

12. are prepared 

13. contain

Đề như này thì bạn phải thêm y^3 vào mới tính được giá trị biểu thức.

Mình thêm y^3 theo ý mình. Bạn xem thử nhé!

\(R=\left(8x^3+12x^2y+6xy^2+y^3\right)+3\left(4x^2+4xy+y^2\right)y+3\left(2x+y\right)y^2+y^3\)

= \(\left(2x+y\right)^3+3\left(2x+y\right)^2y+3\left(2x+y\right)y^2+y^3\)

= \(\left(2x+y+y\right)^3=8\left(x+y\right)^3=8.50^3=...\)

P. TRANSFORMATION

52. The eagle is behind my back. >> My back is in front of the eagle

53. What subjects do you ? << What 's your favourite subject ?

54. The river is on the left of my house. >>  My house is on the right of the river

55. What is your address? >> where is your house?

<< 56. It's quarter to twelve now. >>  It's eleven-forty minutes now

<< 57. How much does she weigh? >> What does she 's weigh ?

<< 58. How do you do. >> What is your job ?

<< 59. I go to school by bike. >> I ride a bike to school .

gmail của cậu đâu???

đây: <trantruongkhactrieu@gmail.com>

\(3x-18=0\)

\(< =>3x=18\)

\(< =>x=\frac{18}{3}=6\)

\(x^2-\frac{2}{3}x=0\)

\(< =>\frac{3x^2-2x}{3}=0\)

\(< =>3x^2-2x=0\)

\(< =>x\left(3x-2\right)=0\)

\(< =>\orbr{\begin{cases}x=0\\x=\frac{2}{3}\end{cases}}\)

P(x) có nghiệm <=> 3x - 18 = 0

                         <=> 3x = 18

                         <=> x = 6

Vậy nghiệm của P(x) là 6

Q(x) có nghiệm <=> x² - 2/3x = 0

                          <=> x( x - 2/3 ) = 0

                          <=> x = 0 hoặc x = 2/3

Vậy nghiệm của Q(x) là x = 0 hoặc x = 2/3

a,\(LHS=a^3+3a^2b+3ba^2+b^3=\left(a+b\right)^3\) (đpcm)

b,\(LHS=a^3-3a^2b+3ab^2-3b^3=\left(a-b\right)^3\) (đpcm)

a) (a + b)³ = a³ + b³ + 3a²b + 3ab² = a³ + b³ + 3ab(a + b) (đpcm)

b) (a - b)³ = a³ - b³ -- 3a²b + 3ab² = a³ - b³ - 3ab(a - b) (đpcm)