Rozlož na súčin výraz \( 8 x^{3}+27 y^{3} \).
\( =(2 x+3 y) \cdot\left(4 x^{2}+6 x y+9 y^{2}\right) \)
\( =(2 x+3 y) \cdot\left(4 x^{2}-6 x y+9 y^{2}\right) \)
\( =(2 x-3 y) \cdot\left(4 x^{2}-6 x y+9 y^{2}\right) \)
\( =(2 x+3 y) \cdot\left(4 x^{2}-6 x y-9 y^{2}\right) \)