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Answer:
-40.59
Explanation:
un is 2 how u=1 n=2 it is becouse it ends in n that is 2
√2=1.41+2 again no +3 not +2 becouse the number it in front
1.41+3=3.41+20=23.41
8^2=64 so 23.41 - 64=-40.59