LÀM GIÚP. MK VS Ạ. MK SẼ CHO 5SAO NHÉ. CÁM ƠN MN

rút gọn : a. (x+2)^2-2(x^2-4)+(2-x)^2 b. (2a+3b)^2+(4a-6b)(2a+3b)+(2a-3b)^2 c. (a-b+c)+(c-b)^2+2(a-b+c)(b-c) d. 3(2^2+1)(2^4+1)(2^16+1)(2^32+1)-2^64

- giúp mình với nhé - toán_lớp 9_căn bậc hai

Vẽ đậu mầm Xấu hay đẹp đều đc =)))

Cho ΔABC nhọn, đường cao BD và CE cắt nhau tại H. CM: a) ΔADB đồng dạng với ΔAEC b) HB. HD=HC. HE c) góc ADE = góc ABC

Viet mot bai tho noi ve co giao

Thầy cô giúp em câu này với ạ e cảm ơn ạ

Tính $\dfrac{\dfrac{2012}{1}+\dfrac{2011}{2}+\dfrac{2010}{3}\ \!\!+\ \!\!.\!.\!.+\;\! \dfrac{1}{2012}}{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}\ \!\!+\ \!\!.\!.\!.+\ \;\!\!\dfrac{1}{2012}}$.

Tìm x ............GIÚP MÌNH VỚI..........

Exercise 2: Rewrite the following sentences. 1. Her old house is bigger than her new one. -> Her new house.... 2. No one in my class is taller than Peter. -> Peter... 3. The black dress is more expensive than the white one. -> The white dress....... 4. According to me, English is easier than Maths. -> According to me, Maths..........5. No one in my group is more intelligent than Mary. -> Mary.. 6. No river in the world is longer than the Nile. -> The Nile. 7. Mount Everest is the highest mountain in the world. -> No mountain.. 8. This is the first time I have ever met such a pretty girl. -> She is.. 9. No hotel in the city is more comfortable than this one. -> This hotel.... 10. This film is the most interesting film of all. -> No other films are.. 11. The black car is cheaper than the red car. -> The red car.. 12. The black dress is more expensive than the white one. -> The white dress.. Mn giúp hộ em nhanh nha