How much is √ 8 - (3 √ 32-2 √ 18)

How much is √ 8 - (3 √ 32-2 √ 18)

-4√2 .

1 = 1 & # 178;; 1 + 3 = 2 & # 178;; 1 + 3 + 5 = 3 & # 178;; 1 + 3 + 5 + 7 = 4 & # 178;... What is the general conclusion reflecting this law

The sum of n odd numbers starting from 1 is equal to N & # 178;
That is: 1 + 3 + 5 + ＋(2n－1)=n²

Calculation of power: - 7 & # 178; + 2 × (- 3) &# 178; + (- 9) × (- 3 / 1) &# 178;
Wrong number, it should be: - 7 & # 178; + 2 × (- 3) &# 179; + (- 9) × (- 1 / 3) &# 178;

：-7²+2×（-3）³+（-9）× (-1／3)²
＝﹣49＋2×﹙﹣27﹚－9×﹙1／9﹚
＝﹣49－54－1
＝﹣﹙49＋54＋1﹚
＝﹣104