Bài 1: \(^{x^2}\)- (2m-1)x +\(m^2\)-6=0

a, giải m=3

b, tìm m để phương trình có 2 nghiệm phân biệt

thỏa mãn: \(x_1^2\)+\(_{x^2_2}\)=16

1. we..........to England for our holiday last summer

A. go B.are going C.have gone D. went

2. - these figures are too complicated to work out in your head

- yes,...........a caculator

A. i wish we would have B. if only we had

C.if only we ha had D.i wish we have

3. tom would rather............free tomorrow

A.is B.was C.be D.will be

4.what's the name of the man............gave us a lift?

A.he B.what C.which D. who

5. were you able to locate the person............wallet you found?

A.whose B.whom C.which D.who

6.would you mind wating.................minutes?

A.a few B.a little C.few D.little

7.what is the difference.................a boat and a ship?

A.between B. from C.under D.with

8.John is much..............than i thought

A. strong B. stronger C. strongest D. as strong

1. "you had to work hard " she said to us

=>She advise us.....................................

2. "what will you do tomorrow morning?" he said to me

=> he asked me.....................................

3. we were late for school because of the heavy rain

=>because it........................................

4. my mother often cleans the floor every afternoon

=>the floor..........................................

5. "i'm working in the restaurant now" she said

=>she said............................................

6. they started to work for that company when they left school

=>they have................................

7. people built a new hospital near our house 3 months ago

=>a new hospital....................................

8. i don't have enough money, so i can't buy that beatiful shirt

=>if i.......................................................

9. my parents bought me a new computer. it is very expensive

=>my parents................................................

10. unless/she/try/her best/improve/her study/not/pass/the exam

=>.............................................

2.i(not meet)....Lan since June

3. they are used to (speak)......English language lessosns

4. the last time she (go).....to HCM city was in 2009

5. she earns her living by (sell).......fruit

6. Lan: you (meet)..........your parents recently, Hoa?

Hoa:yes, once a month. They (visit)........me a day ago

7. A meal (cook)..........at the moment

8.If i (know).........her phone number now, i would give to you

9.when he (come).......home,his wife(prepare)........the dinner

10. Hanh and her morther (just/arrive)........home from the market

tìm lỗi sai và sửa lại

1. I met my old english teacher while I was walked along the streets

2. in spite of she was very sick, she finished the test on time

3. Hoa worked hard yesterday, doesn't she?

4. I always look forward to meet you

5. The weather was such cold that nobody wanted to go out

6. our teacher suggested practising speak English in English lessons

7. i wish i can go to the cinema with you tonight

8. Jim said that he was playing the pian in the hall now

i am learning english in an evening course minh said to his friend

cho tam giác ABC vuông tại A biết AC= 8cm, BC=10cm

a, tính độ dài AB và đường cao AH

b, tính số đo góc HAC

the climbers spent three days reaching the top of mountain

cho tam giác ABC vuông tại A, AB =6cm, AC=8cm. Đường tròn (I) nội tiếp tam giác ABC tiếp xúc với AB,AC theo thứ tự ở D và E

a, Tính số đo góc BIC

b, Tính diện tích tứ giác ADIE