m.a =
[tex] \frac{a + b}{2} [/tex]
[tex] a = \sqrt{64} = 8[/tex]
[tex]b = \frac{6}{ \sqrt{2} } + 2 - \sqrt{18} = \frac{6}{ \sqrt{2} } + 2 - 3 \sqrt{2} = \frac{6 \sqrt{2} }{2} + 2 - 3 \sqrt{2} = 3 \sqrt{2} + 2 - 3 \sqrt{2} = 2[/tex]
m.a =
[tex] \frac{8 + 2}{2} = \frac{10}{2} = 5[/tex]
