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= 2√2(√2 + √6) - √6(√2 + √6)
= 4 + 2√12 - √12 - 6
= √12 - 2
= 2√3 - 2
(-v6×v2)+ (-v6×v6) = 4 +2v12 - v12 - 6 =
-2 - v12