m=| 2√2 - 3 |+| 1 + √2 | =3-2√2+1+√2=4-√2
2√2 - 3<0 ⇒| 2√2 - 3 |=-( 2√2 - 3 )=3-2√2
1 + √2 >0 | 1 + √2 |=1 + √2
n=| 2 - √2 | + 2*(1 + √2 ) =2 - √2 + 2 + 2√2 =4+√2
2 - √2>0 ⇒| 2 - √2 | = 2 - √2
ma=(m+n)/2=(4-√2+4+√2)/2=8/2=4
mg=√m×n=√(4-√2)(4+√2)=√16-2=√14