Question

simplify the following (2x -y) - (2x +y)³​

Answer 1

$2x - y - {(2x + y)}^{3} \\ = 2x - y - ( {8x}^{3} + 12 {x}^{2} + 6x {y}^{2} + {y}^{3} ) \\ = 2x - y - 8 {x}^{2} - 12 {x}^{2} y - 6x {y}^{2} - {y}^{3}$

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