For those struggling with in Pre-Calculus, I strongly recommend flipping through your Algebra 2 textbook (if you still have it :) ). Depending on how comfortable you feel with Algebra 2 will totally dictate how you easy Pre-Calculus is for you. Some of the skills that Algebra 2 makes you practice and that Pre-Calculus relies on are plotting and factoring quadratic equations, factoring in general, solving rational expressions and inequalities.