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CORRECTIONS: ON MINUTES 9:15 , 10:50 , and 12:30 THE FIRST TERM OF THE TRINOMIAL SHOULD BE SQUARED. In this video I explain how to do the six main cases of factoring: difference of two squares, perfect squares, sums and differences of cubes, second degree polynomials, factoring by grouping, and factoring a second degree polynomial where the leading coefficient is not 1.