M=

Với a>0;a≠1

\(\left(\frac{1}{1-\sqrt{a}}-\frac{1}{1+\sqrt{a}}\right)×\left(\frac{1}{\sqrt{a}}-1\right)\)

\(\left[{}\begin{matrix}\\\\x+y-10=0\end{matrix}\right.\frac{x}{y}=\frac{2}{3}\)

giải hpt ạ

mk cần đáp án nhanh !!!!

làm nhanh nha >.<

you(SEE)...Duy and Phuong recently ?

a.we (go )... to school every morning except Sundays.

b. I can't answer the phone . I (have).... a bath.

c. She (live )...in Rome when she (be)...a little girl.

d.when I (get)...home my mother (iron)...clother.

e. Last night while her father (read)...a book , her mother (watch)...TV.

mk cần lm nhanh nha ! Help me !!

1....you do better work than this , you won't pass the exam.

A.When B. Although C.If D.Unless

2.I was just ...to go out when you telephoned.

A. around B. about C. thinking D. planned

3.It's difficult to pay one's bills when prices keep ... .

A. growing B.gaining C.rising D. raising

4. She ... her neighbor's child for the broken window .

A. blamend B. accused C. complained D. denied

5. "Did you like the novel that I gave you last week ?"

-".... the novels that I've read , I enjoyed this one the most ."

A. all of B. of all C. for all D. from all

6. That old lady is ... deaf to hear what you say .

A. so B.enough C.not D.too

7. I failed to buy that nice dress , for I had forgotten to bring my ....

A. gloves B . purse C. bonnet D. trousere

8. the radio is ... loud . I can't hear the noise .

A. too many B. too much C. much too D. lot much

9. The visitor spoke ... the subject of wildlife in northern Britain.

A. in B.from C.with D. on

10. Not they but Tam...the reward .

A. receives B. receive C. receiving D. to receive

11. They have ... of helpers even when they are in need .

A. a great quantity B. a large amount C. a large number D. great number

12.one person... seven in the world speaks perfect english .

A. out of B. within C. for among D. from

Mk cần gấp nha ! Help me

>.<

sửa lỗi sai :

a.khoa's professor had him to write his thesis many times before allowing him to present it to the committee.

A. to write

B . many times

C. allowing

D. to the committee

b. I think Hanh is accustomed to work eight hours a day

A. think

B. is

C. work

D. a day

c. The more frequent you exercise , the greater physical endurance you will have

A. frequent

B. exercise

C. greater

D. will have

d.Only when you have had a chance to know various occupations you will decide on your career .

A. only when

B. have had

C. to know

D. you will decide

e. I tried to do everything to contact Minh two weeks ago but so far I don't receive his reply

A. tried to do

B . to contact Minh

C. so far

D. don't receive

HELP ME >.< Mk cần gấp nha :D