cho phương trình: \(\frac{x}{x-1}\)=1-2m (1), với m là tham số (m ≠ 0 ). Tìm m để phương trình (1) có nghiệm duy nhất

II. Using word cues to complete these sentences

1. We / can swim / much / skillful / than they.

2. These/ novels / write / 2 years / ago?

3. John / never / eat / Chinese food / before.

4. Jane / absent / class / yesterday / because / she / ill.

5. Noise/ pollution/ occur/ because/ there / too many/ loud/sounds/ environment/.

6. We/ jog/ park/ when/ it/ rain /yesterday.

7. Most/ people/ not know/ where/ their / plastic/ waste/ go.

8. I/ find/ difficult/ understand/ someone.

9. I/ like / take/ to/amusement center/ hen/ small.

10 .summer/ children/enjoy/ take part/ local/ or/ international summer camp.

IV. Choose the word that are not correct in standard English.

1. Pushing in is seen as extreme rude in any puplic places in Canada.

2. If you are a superhero, what would you do?

3. For every ton of recyclednewsprintnearly ten trees can save.

4. Do you thinkit is necessary to practicing English every day?

5. When the teacher was coming into the classroom, we were discussingour project

6. Would you mindto turndown the radio a little bit?

8. American throw about twenty eight and a half million tons of plastic in landfills every year.

9. He worked in a noisy environment for a long time, because his hearing became worse.

10. What will you do if you saw a ghost at night?

Cho ΔABC vuông tại A, đường cao AH .Kẻ HD vuông với AB,HE vuông góc với AC . Gọi O là giao điểm của AH,DE

a)CM AH=DE

b)P,Q lần lượt là trung điểm của BH,CH.CM DEQP là hình thang vuông

c)CM: O là trực tâm của ΔABQ

d)CM :SΔABC=2 S DEQP

Bài 8:Giải cácphương trình sau.

a) (3x – 2)(4x + 5) = 0 b) 2x(x – 3) + 5(x – 3) = 0

c) (2x + 1)(3x – 2) = (5x – 8)(2x + 1) d) 3x – 15 = 2x(x – 5)

e) x(2x – 9) = 3x(x – 5) f) (x + 2)(3 – 4x) = x² + 4x + 4

g) (x –\(\sqrt{2}\)) + 3(x² – 2) = 0 h) (2x – 5)² – (x + 2)² = 0

i) 2x³ + 5x² – 3x = 0 k) 2x² – 6x + 1 = 0

Bài 6:Giải các phương trình sau.

a) 1,2 – (x – 0,8) = –2(0,9 + x) b) 3,6 – 0,5(2x + 1) = x – 0,25(2 – 4x)

c) 2,3x – 2(0,7 + 2x) = 3,6 – 1,7x d) 0,1 – 2(0,5t – 0,1) = 2(t – 2,5) – 0,7

Bài 5:Giải các phương trình sau.

a) 3 – 4y + 24 + 6y = y + 27 + 3y b) 5 – (x – 6) = 4(3 – 2x)

c) (x + 1)(2x – 3) = (2x – 1)(x + 5) d) 2x(x + 2)² – 8x² = 2(x – 2)(x² + 2x + 4)

e) (x – 3)(x + 4) – 2(3x – 2) = (x – 4)² f) (x + 1)(x² – x + 1) – 2x = x(x + 1)(x – 1)