Răspuns:
Explicație pas cu pas:
4)a)
√8 = 2√2
√27 = 3√3
[tex]a = \frac{2*2\sqrt{2} }{\sqrt{2}} +\frac{3*3\sqrt{3} }{\sqrt{3}}\\\\a = 2*2 +3*3 \Rightarrow a = 4+9 \Rightarrow \boxed{a=13}[/tex]
[tex]b = (\sqrt{5} )^{2} + (\sqrt{3} )^{2} +2^{2} +2 * \sqrt{5} *\sqrt{3} + 2 * \sqrt{5} *2*\sqrt{3}*(-2)-2\sqrt{15} +4\sqrt{5} + 4\sqrt{3}+1\\\\b = 5+3+4+2\sqrt{15} -4\sqrt{15} -4\sqrt{3} -2\sqrt{15} +4\sqrt{5} +4\sqrt{3} +1\\\\b = 5+3+4+1\Rightarrow \boxed{b = 13}[/tex]
[tex]Ma = \frac{a+b}{2}\Rightarrow Ma= \frac{13+13}{2} \Rightarrow Ma = \frac{26}{2}\Rightarrow \boxed{Ma = 13}[/tex]
