Question

simplify
(3x+y)³ - (3x-y) ³
​

Answer 1

Answer: 27 x^3 +y^3 -27x^3 -y^3 =2y^3

Step-by-step explanation:

Answer 2

Answer:

2( y³ + 27 x²y)

Step-by-step explanation:

$(( {3x})^{3}+ {y}^{3} + 3( {3x})^{2} y + 3(3x) {y}^{2} ) - (( {3x})^{3} - {y}^{3} - 3( {3x})^{2} y + 3(3x) {y}^{2} ) \\ ( {27x}^{3} + {y}^{3} + 3( {9x}^{2})y + 9x {y}^{2} ) - ( {27x}^{3} - {y}^{3} - 3( {9x}^{2})y + 9x {y}^{2} ) \\ ( {27x}^{3} + {y}^{3} + {27x}^{2}y + 9x {y}^{2} ) - ( {27x}^{3} - {y}^{3} - {27x}^{2}y + 9x {y}^{2} ) \\ {27x}^{3} + {y}^{3} + {27x}^{2}y + 9x {y}^{2} - {27x}^{3} + {y}^{3} + {27x}^{2}y - 9x {y}^{2} \\ 2 {y}^{3} + 54 {x}^{2} y \\ 2( {y}^{3} + 27 {x}^{2} y) \: ans$