Question

(6m-3)(6m+9)

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Answer 1

$(6m - 3)(6m + 9) = \\ 36 {m}^{2} + 54m - 18m - 27 \\ 36 {m}^{2} + (54m - 18m) - 27 \\ 36 {m}^{2} + 36m - 27$

Answer 2

$(6m - 3)(6m + 9) \\ \\ 6m \times 6m + 6m \times 9 - 3 \times 6m - 3 \times 9 \\ \\ = \\ \\ \\ 36m ^{2} + 54m - 18m - 27$

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