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Verified answer
Jawab12/ (3 +√5) =
= 12 (3 - √5)/ (3+√5)(3 -√5)
= 12 ( 3 - √5)/ (9-5)
= 12/4 ( 3 - √5)
= 3 ( 3 - √ 5)
= 9 - 3√5
dikalikan dengan sekawannya
= 12/(3+√5) x (3-√5)/(3-√5)
= 12 (3-√5) / (3+√5)(3-√5)
= 36 - 12√5 / 9 - 5
= 36 - 12√5 / 4
= 9 - 3 √5 (B)