# Difference between Algebra Basics, Algebra 1, and Algebra 2/Prerequisites for Calculus

Hello! I'm planning to take a college calculus class next semester, but it's been quite a few years since I did math. With the help of Khan Academy, I want to take the rest of the year to relearn the concepts of algebra, trigonometry, and precalculus so I can be prepared for the calculus class.

I'm not sure what algebra course I should start off with. I'm seeing Algebra Basics, Algebra 1, and Algebra 2. Which ones should I take?

Another question I have is whether is it doable to complete the Algebra course(s), Precalculus, and Trigonometry courses within 4 months. If not, then I'll take a class that has precalc and trig next semester.

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