Răspuns:
Explicație pas cu pas:
[tex]a=\sqrt{98}-\sqrt{32}=\sqrt{49*2}-\sqrt{16*2}=7\sqrt{2}-4\sqrt{2}=3\sqrt{2} \\b=\sqrt{162}+\sqrt{18}=\sqrt{81*2}+\sqrt{9*2}=9\sqrt{2}+3\sqrt{2}=12\sqrt{2}\\Mg=\sqrt{a*b}=\sqrt{3\sqrt{2}*12\sqrt{2}}=\sqrt{36*(\sqrt{2})^{2} }=6\sqrt{2}\\Ma=\frac{a+b}{2}=\frac{3\sqrt{2} +12\sqrt{2}}{2}=\frac{15\sqrt{2} }{2} \\[/tex]