[tex]\Rightarrow\;\;\;m_{g)=\sqrt{{a}\cdor{b}}=\sqrt4=2 [/tex]a = (√3 - 1)(√6+2) si b = (√3+1)(√6 - 2)
La produsul numerelor a*b se va aplica formula de calcul prescurtat
(a-b)(a+b)=a² - b² !!!
[tex]m_{g}=\sqrt{a\cdot{b}[/tex]
[tex]a\cdot{b}=\underbrace{(\sqrt3-1)(\sqrt3+1)}_{3-1}\underbrace{(\sqrt6+2)(\sqrt6-2)}_{6-4}=2\cdot2=4[/tex]
[tex]m_{g}=\sqrt{a*b}=\sqrt4=2.[/tex]
