Part A: Factor 3x2y2 - xy2 - 2y2. Show your work. (3 points)
Part B: Factor x2 + 6x + 9. Show your work. (3 points)
Part C: Factor x2 - 25. Show your work. (2 points)
Part D: Do the polynomials in parts A, B, and C have a common factor? Explain your answer. (2 points)