The Forgotten Identity

Math22 has just joined forces with Electronics in degrading every grade possible. For these subjects, an A, a B+ or a B does not exist. I took my very first exam last night made by the most famous terror teacher in the Department of Mathematics. As my blockmates have called it...

The Ultimate Cabral Challenge

All I can do after the exam is freaking regret about something I should have done so that I have another 12 freaking sure points. Sh*t. This identity is overused that I almost forgot how to use it. OKAY. I did not use it in the exam when I am supposed to. I did not. I repeat. I FREAKING DID NOT.

I admit I am used to forgetting things but how can life be so cruel when all I just need to remember is this equation to answer the first problem.

And all I can say is that the test was sooooooo difficult.