How do you factor the difference of two squares

How do you factor the difference of two squares?
How do you factor the perfect square trinomial?
How do you factor the sum and difference of two cubes?
Which of these three makes the most sense to you? Explain why.
What one area from the readings in Week Three are you most comfortable with? Why do you think that is? Using what you know about this area, create a discussion question that would trigger a discussion—that is, so there is no single correct answer to the question.