Giải giúp mik vs
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\(3x\left(x-y\right)+x-y\)
\(=3x\left(x-y\right)+1\left(x-y\right)\)
\(=\left(x-y\right)\left(3x+1\right)\)
Bài này quá dễ
x/40 - x/50= 1/3
<=>5x/200 - 4x/200=1/3
<=> x/200= 1/3
<=> x= 200/3.
bạn ê, mik bị ngu toán, lười suy nghĩ ấy mà nên đừng nói dễ hay khó j vs mik
\(\left|2x-3\right|=3-2x\)
\(ĐK:x\le\dfrac{3}{2}\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-3=3-2x\\3-2x=3-2x\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\0=0\left(đúng\right)\end{matrix}\right.\)
Vậy \(S=\left\{x\in R;x=\dfrac{3}{2}\right\}\)
2 do
3 usually buy
4 press
5 enjoy
6 has
7 goes
8 gets
9 eat
10 doesn't study
11 doesn't eat
12 doesn't water
13 don't go
14 doesn't eat - is
15 Do - go
16 Do - agree
17 Do you have
18 Do you often eat
19 Does - start
20 does he come
21 does - work
22 does
23 does - do
24 does- go
Xét tam giác ABH vuông tại H có:
\(sinB=\dfrac{AH}{AB}=0,5\Rightarrow AB=\dfrac{AH}{0,5}=\dfrac{5}{0,5}=10\)
Xét tam giác ABH vuông tại H có:
\(AB^2=AH^2+BH^2\left(Pytago\right)\)
\(\Rightarrow BH=\sqrt{AB^2-AH^2}=\sqrt{10^2-5^2}=5\sqrt{3}\)
1. After he had graduated from the National University, he worked as a physicist.
2. John had done his homework before he went to bed.
3. Peter wishes he had studied hard at university.
4. Mai said she had seen their former teacher the previous afternoon.
5. After we had lived in Ha Noi for ten years, we moved to Ho Chi Minh City.
6. Who does this bag belong to?
7. I prefer cycling to traveling by motorbike to work.
8. After he had left school, he joined the army.
9. When were you born?
10. Why is this computer out of order?
11. She is looking forward to meeting her cousin again.
1. We were driving along a narrow road when the car broke down.
2. David and I wanted to go off to search for help but Bill insisted I stay near the car.
3. By working hard, he succeeded in finishing the job in time.
4. However, I and David didn't agree and David pointed out a path which I will probably lead to a village.
5. We followed the path but soon we were hopelessly lost.
6. After 1 hour or so, we began to feel very frightened.
7. Then, David fell and cut his arms and legs.
8. I decided to climb the tree to see where we were.
1. After he had graduated from the National University, he worked as a physicist.
2. John had done his homework before he went to bed.
3. Peter wishes he had studied hard at university.
4. Mai said she had seen their former teacher the previous afternoon.
5. After we had lived in Ha Noi for ten years, we moved to Ho Chi Minh City.
6. Who does this bag belong to?
7. I prefer cycling to traveling by motorbike to work.
8. After he had left school, he joined the army.
9. When were you born?
10. Why is this computer out of order?
11. She is looking forward to meeting her cousin again.
1. We were driving along a narrow road when the car broke down.
2. David and I wanted to go off to search for help but Bill insisted I stay near the car.
3. By working hard, he succeeded in finishing the job in time.
4. However, I and David didn't agree and David pointed out a path which I will probably lead to a village.
5. We followed the path but soon we were hopelessly lost.
6. After 1 hour or so, we began to feel very frightened.
7. Then, David fell and cut his arms and legs.
8. I decided to climb the tree to see where we were.