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= 2 x 2 : √5
= 4/√5
= 4/√5 x √5/√5
= 4x√5 / √5x√5
= 4√5 / √25
= 4√5 / 5
= 4/5 √5
jawabannya yang i
2 x 2 per 5 = 4/5
mengapa 2 x 2? karna √4=2