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Kalikan dengan sekawan
(6√5 / √5 - 2) * (√5 + 2 / √5 + 2)
(=) (6√5)(√5) + (6√5)(2) / (√5)(√5) + (√5)(2) + (-√5)(2) + (-2)(2)
(=) (6.5) + 12√5 / 5 - 4
(=) 30 + 12√5 / 1
(=) 30 + 12√5