Answer:
The German-Soviet Pact, signed in August 1939, paved the way for the joint invasion and occupation of Poland that September. By signing the agreement, Hitler avoided the threat of a major two-front war
Explanation:
The Dark Ages is generally considered as the early medieval period of the European history. After the collapse of the Roman Empire, Europe faced a drastic political, economic and social set back. The Dark Ages reflects the ill-consequences of this set back.
1.the president has the sole power to negotiate and sign treaties. but must have 2/3 of senate agree to it.
2. the power to make executive agreements with other countries. these agreements have the the same legal status as treaties, but they do not require senate conduct.
3. where the united stated will recognizes government of other countries and have dealing with that government.
I believe it's quadratic, as quadratic matches the second time while linear matches the first time you find the differences.