Làm câu b nha, a làm rồi

1.Parents should instill in their children a respect for their country's tradition and culture

2.Everyone should goes home for a family reunion regularly

3.You should travel more to broaden your horizon

4.Jim should study better

5.We shouldn't go to our vacation because it's very far from our location

6.They shouldn't rude to other people

7.You should pay more attention to what your parents say

8.When ever* you go, you should pay close attention to the maner and etquettes there

Dịch:

1. Cha mẹ nên truyền cho con cái sự tôn trọng truyền thống và văn hóa của đất nước mình

2.Mọi người nên về nhà sum họp gia đình thường xuyên

3. Bạn nên đi du lịch nhiều hơn để mở rộng chân trời của bạn

4.Jim nên học tốt hơn

5.Chúng ta không nên đi nghỉ vì nó rất xa vị trí của chúng ta

6. Họ không nên thô lỗ với người khác

7. Bạn nên chú ý hơn đến những gì cha mẹ nói

8.Khi bạn đi, bạn nên chú ý kỹ đến bản đồ và đồ trang trí ở đó

*Câu 8 phải thay chữ never thành ever:

Có thay:When ever you go = Khi bạn đi

Ko thay:When never you go = Khi bạn không bao giờ đi

私のようにしてください

Hãy mình nhé ^_^

1. You should go to see the doctor regularly

2. What dress should I wear today ?

3. The teacher thinks Jim should study harder

4. The boys should not climb up the wall

5. Should I watch TV or go out with friends now ?

6.If Jim is sick , he should stay at home

7. How much water should we srink everyday ?

8. What should I not do at Christmas restaurant ?

9. You should inform to your parent before you go.

1. You should go to see the doctor regularly

2. What dress should I wear today ?

3. The teacher thinks Jim should study harder

4. The boys should not climb up the wall

5. Should I watch TV or go out with friends now ?

6.If Jim is sick , he should stay at home

7. How much water should we srink everyday ?

8. What should I not do at Christmas restaurant ?

9. You should inform to your parent before you go.

10 . You should inform to your parent before you go

Bài làm

9x² = 4( 2x - 3 )²

<=> 9x² - 2²( 2x - 3 )² = 0

<=> 9x² - [ 2( 2x - 3 ) ]² = 0

<=> ( 3x )² - ( 4x - 6 )² = 0

<=> ( 3x - 4x + 6 )( 3x + 4x - 6 ) = 0

<=> ( 6 - x )( 7x - 6 ) = 0

<=> \(\orbr{\begin{cases}6-x=0\\7x-6=0\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=6\\x=\frac{6}{7}\end{cases}}\)

Vậy x = 6 hoặc x = 6/7

\(9x^2=4\left(2x-3\right)^2\)

\(\left(3x\right)^2=\left(4x-6\right)^2\)

\(\left(3x\right)^2-\left(4x-6\right)^2=0\)

\(\left(3x-4x+6\right)\left(3x+4x-6\right)=0\)

\(\left(6-x\right)\left(7x-6\right)=0\)

\(\Rightarrow\orbr{\begin{cases}6-x=0\\7x-6=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=6\\x=\frac{6.}{7}\end{cases}}\)

\(\text{a) }4NH_3+5O_2\rightarrow4NO+6H_2O\)

\(\text{b) }S+2HNO_3\rightarrow H_2SO_4+2NO\)

a) 4NH₃ + 5O₂ -> 4NO + H₂O

b) S + 2HNO₃ -> H₂SO₄ + NO

\(P=\frac{x^3-y^3+z^3+3xyz}{\left(x+y\right)^2+\left(y+z\right)^2+\left(z-x\right)^2}\)

Ta có:Tử số: \(x^3-y^3+z^3+3xyz\)

     \(=\left(x+z\right)^3-3zx\left(x+z\right)-y^3+3xyz\)

    \(=\left(x+z-y\right)\left[\left(x+z\right)^2+y\left(x+z\right)+y^2\right]-3xz\left(x+z-y\right)\)

    \(=\left(x-y+z\right)\left(x^2+y^2+z^2+xy+yz-zx\right)\)

         Mẫu số: \(\left(x+y\right)^2+\left(y+z\right)^2+\left(z-x\right)^2\)

   \(=x^2+2xy+y^2+y^2+2yz+z^2+z^2-2zx+x^2\)

     \(=2\left(x^2+y^2+z^2+xy+yz-zx\right)\)

Suy ra \(P=\frac{x-y+z}{2}\)

\(\frac{x^3-y^3}{2y}.\left[\frac{2y}{4-2y-2x+xy}+\frac{2xy+4y}{\left(x-y\right)\left(x^2-4\right)}\right]\)

\(=\frac{x^3-y^3}{2y}.\left[\frac{2y}{\left(x-2\right)\left(y-2\right)}+\frac{2y\left(x+2\right)}{\left(x-y\right)\left(x-2\right)\left(x+2\right)}\right]\)

\(=\left(x^3-y^3\right).\left[\frac{x-y}{\left(x-y\right)\left(x-2\right)\left(y-2\right)}+\frac{y-2}{\left(x-y\right)\left(x-2\right)\left(y-2\right)}\right]\)

\(=\frac{\left(x-y\right)\left(x^2+xy+y^2\right)\left(x-2\right)}{\left(x-y\right)\left(x-2\right)\left(y-2\right)}\)

\(=\frac{x^2+xy+y^2}{y-2}\)