va rog sa faceti rezolvarea explicit,dau coroana.
![Va Rog Sa Faceti Rezolvarea Explicitdau Coroana class=](https://ro-static.z-dn.net/files/d64/9466059a106a34496646993f497169d1.png)
[tex]\it b=2\sqrt2+\sqrt{27}-5=2\sqrt3+\sqrt{9\cdot3}-5=2\sqrt3+3\sqrt3-5=5\sqrt3-5\\ \\ \\ m_a=\dfrac{a+b}{2}=\dfrac{-5\sqrt3+19+5\sqrt3-5}{2}=\dfrac{14}{2}=7[/tex]