/sci/ - Science & Math

>>8761985
Are you retarded?

5(2-2)=0

5x2+5(-2)=0

10+5x(-2)=0

So we know positive times a negative must be a negative, now:

-5(2-2)=0

-5x2+(-5)x(-2)=0

-10+(-5)x(-2)=0

-10+10=0

Now we know negative times a negative must be a positive.

What is your favorite Death Grips song? Mine is "Come up and get me" because it reminds me of my own life in my lonely apartment.

For me the toughest by far was 'Approximation Algorithms' (MSc level course). Basically, given some optimization problems, we were required to come up with approximation algorithms that are guaranteed to give a solution which is within some given factor from the optimal solution, and then prove that it works correctly. The algorithms themselves were easy as fuck, but the proofs tend to be absolutely brutal.