Respuesta :

Hrishii

Step-by-step explanation:

[tex]h(a) = 2a - 4 \\ \\ (h.h)(a) = h(a).h(a) \\ = (2a - 4 ).(2a - 4 ) \\ = {(2a - 4 )}^{2} \\ = 4 {a}^{2} - 16a + 16 \\ \\ \red{ \boxed{ \bold{ \therefore \: (h.h)(a) =4 {a}^{2} - 16a + 16}}}[/tex]