Answer:
[tex](2x-3y^{2} ) * (2x-3y^{2} ) * (2x-3y^{2} )[/tex]
=(1) 2x*2x*2x = 8x^3
(2) -3y^2* -3y^2* -3y^2 = [tex]-27y^{6}[/tex]
(3) 2x * -3y^2 * 2x = -12 x^2 y^2
(4)-3y^2*-3y^2*2x = 18xy^4
(5) -3y^2*-3y^2*2x = 18xy^4
(6) 3y^2*-3y^2*2x = 18xy^4
(7) 2x * -3y^2 * 2x = -12 x^2 y^2
(8)2x * -3y^2 * 2x = -12 x^2 y^2
final answer: [tex]8x^3 -36x^2y^2+54xy^4-27y^6[/tex]