Yes it's a assertion due to the simple fact that im the statement you have made you have a fact that is given " it was one of the most important equation..." that was a fact that was given
now mind you assertion means a statement of forceful fact or belief
so yess it's a assertion
To what? Be more specific to get more help
Answer:
1.Credibility, accuracy, reasonableness, and support
2.No author listed, no supporting institutions, the author has been controversial or negatively reviewed in the past, the writing is poor or contains errors
3.Is the information fair and balanced, objective, realistic, and consistent?
4.In order to determine whether the author's claims are true and reliable, it's important to know where the author got his or her facts and statistics, and whether these are supported by the majority of experts in his or her field.
it would be complex sentance