Question

Помогите пожалуйста
$(6x - 9) \times (4x + 0.4)$
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Answer 1

$(6x - 9) \times (4x + 0.4) = \\ \\ \\ 6x \times 4x + 6x \times 0.4 - 9 \times \\ 4x - 9 \times 0.4 = \\ \\ \\ \\ 24 {x}^{2} + 2.4x - 36x - 3.6 = \\ \\ \\ \\ {24x}^{2} - 33.6x - 3.6$