That''s probably too broad of a topic to explain on here, especially for someone that isn''t familiar with it to begin with. Maybe you can wait until high school math? Or, if that won''t work, trying asking your math teacher for some books that you could look at to try to learn it yourself. You have to work up to topics in math, though, you can''t really skip ahead in most cases without a foundation so you''re probably going to have to go for the long-term learning approach.
I agree with jaxson''s assessment. I would suggest that some of the PC and Mac-based education software packages, available at places like CompUSA and Best Buy (in the USA at least) might offer a very good way for you to begin teaching yourself these subjects.
Graham Rhodes Senior Scientist Applied Research Associates, Inc.