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entonces racionalizo:
√5/6.(√3/2 + √2/3) / (√3/2 - √2/3).(√3/2 + √2/3)
√5/6.(√3/2 + √2/3) / (3/2 - 2/3)
√5/6.(√3/2 + √2/3) / 5/6
(√15/12 + √10/18) / 5/6
( √5 / 2 + √5 / 3 ) / 5/6
5√5 / 6 ÷ 5/6 = √5
rpta. √5
suerte XD