I learned the patterns in polynomials. like for example:

(2x + 1)(2x+1)

First thing you do is you have to is times (2x)with(2x), then remember with the exponent law that when ever you times a exponent you add them together, then you are going add the two ones and then add a x, then you will multiply the two ones so that you can get your confident number.

This pattern is good because the pattern is easy and fast