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kita rasionalkan √3 / √5...
√3 / √5 = √3 / √5 x √5 / √5
= √15 / 5
√15 / 5 + √2 - √3
= (√15 / 5 + √2 - √3 ) x 5
= √15 + 5√2 - 5√3
:)