Rút gọn: √3/(√(√3+1) -1) - √3/(√(√3+1) -1) √(5+2√6/5-√6) + √(5-2√6/5+√6) √(3+√5/3-√5) + √(3-√5/3+√5)

help me pleasssssssssssssssssssseeeeeeeeeeeeeeeeeeee

x^2 + 3x - 18 = x^2 + 2x . 3/2 + 9/4 - 81/4 = (x + 3/2)^2 - 81/4 = (x + 3/2)^2 - (9/2)^2 chỗ 9/2 làm -9/2 đc k ạ?

cách giải 123456789 ² (mk có câu trả lời r )

Nguyên tửY có tổng sốhạt trong nguyên tửlà 34. Xác định Y?

Hurry up! Specific Answer: Heart+five stars Most convincing: Best Answer

REPORTED SPEECH: YES/NO QUESTIONS 11She said to me, “ Are you angry?” ……………………………………………………………………………………………….. 12.“ did you go to the party last night?” Nam said to me. ……………………………………………………………………………………………….. 13.“ Will you go to Nha Trang tomorrow?” Lan asked Nam. ……………………………………………………………………………………………….. 14.“ Are you wearing your overcoat, Ann ?” He asked. ………………………………………………………………………………………………. 15He asks me, “ Are you tired?” ……………………………………………………………………………………………….

Chuyển từ câu trực tiếp sang gián tiếp 1."i was so tired that i couldn't sleep" she said 2."Be careful with the matches, Ann" She told Ann 3."Don't go too far" he advised her 4."Peter, do you prefer tea or coffee?" she asked Peter 5." The parcel ought to be here bt the end of next week " Brian said

A là công thức phân tử của tinh thể ngậm nước CuSO4.nH2O trong đó chứa 36% lượng nước kết tinh. a) Xác định công thức phân tử của A? b) cần bao nhiêu g tinh thể A và bao nhiêu g tinh thể CuSO4 8% để khi trộn vào nhau thì thu được 280g dd CuSO4 16% GẤP Ạ

II. Phonetics: Find the word which has a different sound in the part underlined. (1pt) 1. A. nothing B. them C. they D.although 2. A. ear B. there C. here D. dear 3. A. bag B. dark C. cat D. apple 4. A. visited B. cooked C. helped D. missed III Rewrite the sentence without changing its meaning 1. She doesn't speak English as correctly as I - I can.................. 2.I can speak English more clearly than Son - Son can't............. 3. No one is as clever as Hoa in my class - Hoa is............ Part 1. Rewrite the sentence so that it means as the first ones, beginning with the given words. (1pt) 1. Minh began to collect stamps in 2000. à Minh has___________________________________________________________________________________. 2. She is interested in watching television​ à She likes __________________________________________________________________________________. Part 2. Write a paragraph (about 60 words) about the city in the world that you want to visit. (1pt) ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________