Dựng hình thang ABCD ( AB//CD ) a, biết AB=1,5cm CD=3,5cm góc C=45 độ góc D=60 độ b, biết AB=2cm CD=4cm AD=2,5cm AC=3cm

tính Q=$\frac{2b.\sqrt[]{x ²-1}}{x-\sqrt[]{x ²-1}}$ tại x=$\frac{1}{2}$ ($\sqrt[]{\frac{a}{b} }$ +$\sqrt[]{\frac{b}{a} }$ ) với a,b,>0

châu nam cực nằm trong phạm vi từ ?

I. Supply the correct form of the verbs in brackets to complete the sentences. (10 pts) 1. The thief (catch)………………while he (try)……………….. to break into that house. 2. The buses (run)…………..along this route are all new. 3. When my grandfather was young, he often (go)…………… to work on foot. 4. Lan really enjoys (take)…………..photographs when she travels to the countryside. 5. The sun always (rise)………………….in the east. 6. I am too tired to walk home. I think I (get)………..a taxi. 7. Hurry up! The bus (come)……………and I (not /want)…………..to miss it. 8. I had my computer …………..(repair) by my close friend yesterday. 9. It is raining heavily and the wind is blowing hard. There ……………....(be) a tropical storm. 10. I (do)……………….all the housework. The flat is really clean now. II. Supply the correct form of the words in brackets. (10 pts) 1. Don’t spend much of your time playing video games because it can be……………(ADDICT) 2. The…………........have to cook rice in this contest. (PARTICIPATE) 3. Mo

điền từ thích hợp: susan is sleeping, Don't speak to loud or you may wake her.................... the box is full.............. chocolate and sweets my mother want me to....................... my homework before watching TV don't forget to post the letter....................me

Mọi người giúp e vs an. E cần trong chiều nay. E cảm ơn mng nhiều.

Bài 1: Phân tích đa thức thành nhân tử: a) 5x ² - 5xy - 7x + 7y b) ab - ac - b ² + bc c) 3x ³ - 12x d) x ² - 4 + ( x + 2 ) ² e) x ² - 25 + y ² - 2xy f) 36x ² - a ² + 10a - 25 Bài 2 : Phân tích đa thức thành nhân tử: a) x ² + x +2 b) 3x ² + 7x - 6 c) 8x ² - 23x - 3 d) -10x ² - 17x + 6 Bài 3: Tìm x, biết: a) x ³ - x ² - 25x + 25 = 0 b) 4x ³ - 8x ² - 9x + 18 = 0 Bài 4: Tìm x a) 3x ( x - 1 ) + x - 1 = 0 b) ( x - 2 ) ( x ² + 2x + 7 ) + 2 ( x ² - 4 ) - 5 ( x - 2 ) = 0 c) ( 2x - 1 ) ² - 25 = 0 d) x ³ + 27 + ( x + 3 ) ( x - 9 ) = 0

I. Supply the correct form of the verbs in brackets to complete the sentences. (10 pts) 1. The thief (catch)………………while he (try)……………….. to break into that house. 2. The buses (run)…………..along this route are all new. 3. When my grandfather was young, he often (go)…………… to work on foot. 4. Lan really enjoys (take)…………..photographs when she travels to the countryside. 5. The sun always (rise)………………….in the east. 6. I am too tired to walk home. I think I (get)………..a taxi. 7. Hurry up! The bus (come)……………and I (not /want)…………..to miss it. 8. I had my computer …………..(repair) by my close friend yesterday. 9. It is raining heavily and the wind is blowing hard. There ……………....(be) a tropical storm. 10. I (do)……………….all the housework. The flat is really clean now. II. Supply the correct form of the words in brackets. (10 pts) 1. Don’t spend much of your time playing video games because it can be……………(ADDICT) 2. The…………........have to cook rice in this contest. (PARTICIPATE) 3. Most people dislike him because he is…….......... (FRIEND) 4. Tuan ………..his friends to his house last Christmas Day. (INVITATION) 5. ……………., his mother died in a road accident. (FORTUNATE) 6. A fairy…………………changed Little Pea’s rags into beautiful clothes. (MAGIC) 7. Walking is a fun, easy and ………………activity, and people of all ages and ability can enjoy it. (EXPENSIVE) 8. ……………air is a big problem in the city. ( POLLUTE) 9. We have decided to interview the best six ………………for the job. (APPLY) 10. What’s the correct ………………..of this word? (PRONOUNCE)

E đang cần lắm ạ, cảm ơn nhiều . Ý số 3 ạ

Phân tích thành nhân tử: a) ab(a+b) - bc(b+c) + ac(a-c) b) a(b²+c²) + b(c²+a²) + c(a²+b²) + 2abc c) (a+b).(a²-b²) + (b+c).(b²-c²) + (c+a).(c²-a²) d) a³(b-c) + b³(c-a) +c³(a-b) e) a³(c-b²) + b³(a-c²) + c³(b-a²) + abc(abc-1)