Respuesta :

2st^2-s^2
2x3x8^2-3^2
2x3x64-9
=375
TSO
[tex]2st^2-s^2=~2(3)(8)^2-(3)^2~=~2(3)(64)-9[/tex]

[tex]=~6(64)-9~=~384-9~=~375[/tex]

375 is the answer