(4)3/2x(243)2/5 ?????????¿???????

[tex] { {2}^{2} }^{ \frac{3}{2} } \times { {3}^{5} }^{ \frac{2}{5} } = {2}^{3} \times {3}^{2} = 8 \times 9 = 72[/tex]