Question

Find (3x +4y)(2x-y) do it as fast as possible please...

Answer 1

$(3x + 4y)(2x - y) \\ \\ = 3x(2x - y) + 4y(2x - y) \\ \\ = 6 {x}^{2} - 3xy + 8xy - 4 {y}^{2} \\ \\ = 6 {x}^{2} - 4 {y}^{2} + 5xy$

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