Dau coroana, va rog repede!!!
![Dau Coroana Va Rog Repede class=](https://ro-static.z-dn.net/files/dc1/75dc3e425a41b1a0b12057f250bf1346.jpg)
Salut!
[tex] - 2a \times (3a)^{3} = - 2a \times 27a^{3} = - 54a^{4} [/tex]
Sper că te-am ajutat!