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Verified answer
3√50 x √10 - 25√5= 3√(25.2) x √10 - 25√5
= 3.5√2 x √10 - 25√5
= 15√2 x √10 - 25√5
= 15√20 - 25√5
= 15√(4.5) - 25√5
= 15.2√5 - 25√5
= 30√5 - 25√5
= 5√5
jawab : C