Question

Find the product of (p – 3q) and (3p – q).

Answer 1

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$\: \: \: \: \: \: \: \: \: \: \: = (p – 3q)(3p – q) \\ \: \: \: \: \: \: \: \: \: \: \: = p(3p - q) - 3q(3p - q) \\ \: \: \: \: \: \: \: \: \: \: \: = 3 {p}^{2} - pq - 9pq + 3 {q}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: = 3 {p}^{2} + 3 {q}^{2} - 10pq$

Answer 2

Step-by-step explanation:

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