Respuesta :

gitgud
4x^3+6x-6x^2-9 is my answer

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

2x(2x^2 + 3) - 3(2x^2 + 3) =
4x^3 + 6x - 6x^2 - 9 =
4x^3 - 6x^2 + 6x - 9