FOIL Problem Answers:

1. (x + 4)(x - 8) = x² - 4x - 32

2. (3x - 3)(x + 2) = 3x² + 3x - 6

3. (2x + 1)² = 4x² + 4x + 1

4. (x + 9)(2x² - 3x + 4) = 2x³ + 15x² - 23x + 36

5. (x + 3)(x + 2)(x + 1) = (x + 1)(x² + 5x + 6) = x³ + 6x² + 11x + 6

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