Запишите одночлен в виде квадрата другого одночлена a) 4a^4 b^2; d) 2 1/4 a^2 b^20; d)8a^12 b^21; c)1/27 a^18 b^9 (Помогите)

В треугольнике АВС угол С 90 градусов,АВ=корень из 13,ВС= 3.Найдите tg A.

The history of medicine in Ukraine begins with the history of folk medicine.

The first medical hospitals in Kyiv Rus were founded in the 11 th century and were mostly in the form of alms = houses attached to churches.

In the 14th and 15th centuries new hospitals were built and many physicians gave the first aid to the inhabitants of Ukraine and the sol­diers of Bogdan Khmelnytsky's troops.

будь-ласка напишіть як читається по українському.