Question

please answer my question ​

Answer 1

$(27 {x}^{3} - 8 {y}^{3} - {z}^{3} - 18xyz) \div (3x - 2y - z) \\ \implies \: ( {(3x)}^{3} - {(2y)}^{3} - {z}^{3} - 18xyz)\div (3x - 2y - z) \\ \implies \: 9{x}^{2} - 4 {y}^{2} - {z}^{2} - 18xyz$