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calculeaza:√(6-2√5)(2√5+6)

Răspuns :

√(6-2√5)(2√5+6) = √(6-2√5)(6 +2√5) = √(6² - (2√5)²) = √(36 - 4x5) = √(36 - 20) = √16  = 4
= rad(36-20)=rad16 = +/-4
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