C

b1 nha mn

Câu 2: 

a: =>2/3x=1

hay x=3/2

b: =>x-1/2=2/3-3/2=4/6-9/6=-5/6

=>x=-5/6+1/2=-5/6+3/6=-2/6=-1/3

c: =>4/5x=-4/5

hay x=-1

d: =>x-3+2x+3=0

=>3x=0

hay x=0

cứu mik đi mà mọi người ơi T^T

bạn ra đề khó hỉu quá

ko hỉu lun á

TL :

Hai đường thẳng song song không bao giờ cắt nhau

HT

TL:

Hai đường thẳng song song không bao giờ cắt nhau

-HT-

!!!!!1

1. I have a new car

2. Do you have a book?

3. I have an apple

4. We have made a lot of mistakes

5. We have made a lot of mistakes

6. I only have to think of a sentence.

7. I only have to take one suitcase on the train.

8. I only have to feed fish to the penguins.

9. I have two apples

10. You have beautiful eyelashes

10 ví dụ have là:

do the boys have a football match?

do the girls have a big dinner?

does the girl have short hair?

Does he have yellow hair

do you have nice eyes?

Does she have a round face?

do you have long black hair?

Does the dog have a long tail?

Do they have a glasses?

thêm câu trả lời nx  nha 2 bn

= 32 nha

32

32

\(\left\{{}\begin{matrix}\widehat{OAB}=\widehat{ODC}\left(AB\text{//}CD\right)\\\widehat{OBA}=\widehat{OCD}\left(AB\text{//}CD\right)\\AB=CD\end{matrix}\right.\Rightarrow\Delta OAB=\Delta OCD\left(g.c.g\right)\\ \Rightarrow OA=OD;OB=OC\)

\(a,=\dfrac{\sqrt{2}\left(1+\sqrt{2}\right)}{1+\sqrt{2}}=\sqrt{2}\\ b,=\dfrac{\sqrt{5}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}=\sqrt{5}\\ c,=\dfrac{\sqrt{3}\left(1-\sqrt{2}\right)}{2\left(\sqrt{2}-1\right)}=-\dfrac{\sqrt{3}}{2}\\ d,=\dfrac{\sqrt{5}\left(1-\sqrt{2}\right)}{\sqrt{3}\left(1-\sqrt{2}\right)}=\dfrac{\sqrt{5}}{\sqrt{3}}=\dfrac{\sqrt{15}}{3}\\ e,=\dfrac{\sqrt{7}\left(\sqrt{7}+1\right)}{\sqrt{7}+1}=\sqrt{7}\\ f,=\dfrac{\sqrt{5}\left(\sqrt{5}+1\right)}{\sqrt{5}+1}=\sqrt{5}\\ g,=\dfrac{\sqrt{2}\left(\sqrt{5}-1\right)}{\sqrt{5}-1}=\sqrt{2}\\ h,=\dfrac{\sqrt{5}\left(\sqrt{3}-1\right)}{\sqrt{3}-1}=\sqrt{5}\)