@Konomi_ayamalo@zhao_dashuai Heh, as a Chinese, I love my country. But a lot of people forget that the words right after "Long Live the People's Republic of China" on Tiananmen Gate are "Long Live the Unity of the Peoples of the World."
@tirobump30 The starting point of the mainstream periodization of modern Chinese history is the Opium War of 1840, and the direct trigger of that war was precisely the Chinese government’s anti-opium movement against the abuse of opioid drugs
@baharkarakrt We don't need to calculate the specific values of x and y at all to get the answer.
(x+y)² = 9² = 81
(x-y)² = 5² = 25
(x+y)² − (x−y)² = x²+2xy+y² − (x²−2xy+y²) = 4xy
81 − 25 = 56
56 / 4 = 14
So the answer is 14
@EdmapsCom On the map, there's no such area as "Bosnien und Herzegowina". Actually, after 1908, "Bosnien und Herzegowina" was a "Reichsland" of the Empire.