1. 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.
2. Factor the following by grouping: show steps
x³ + 3x² + 5x + 15
3. Factor this trinomial by grouping: show steps
6x² + 5x - 4