(7-3√5) (7+3√5) what is the ans this que
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AnswEr :
➟ (7 - 3√5)(7 + 3√5)
➟ 7(7 + 3√5) - 3√5(7 + 3√5)
➟ 49 + 21√5 - 21√5 - (9 × 5)
➟ 49 - 45
➟ 4
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