Question

Evaluate:
${(2x + y)}^{3} - {(2x - y)}^{3}$
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Answer 1

(2x + y)^3 -(2x-y)^3

(2x+y-2x+y)( 4x^2+y^2 +4xy +4x^2 +y^2 -4xy+4x^2 -y^2 )

2y(y^2 + 12x^2)
2y^3 +24x^2y

Answer 2

$good \: morning \: \\ \\ \\ \\ (2x + y) {}^{3} - (2x - y) {}^{3} = \\ \\ \\ \\ 8x {}^{3} + y {}^{3} + 12x {}^{2} y + 6xy {}^{2} - 8x {}^{3} + y {}^{3} + 12 {x}^{2} y - 6xy {}^{2} \\ \\ \\ \\ \\ \\ \\ 2y {}^{3 } + 24x {}^{2} y$