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Verified answer
Jawab29. Luas kubus = 6 s² = 6 ( 1 / (2- √2)²
= 6 ( 1/ (4+2 - 4√2))
= 6/ (6 - 4√2)
= 6(6 + 4√2) / /(36- 32)
= (36 + 24√2)/ (4)
= 9 + 6√2