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(3laputera8)la a 7-9la puterea28

Răspuns :

(3^8)^7-(3²)^28= 3^(8*7)-3^(2*28)=3^56-3^56 =0 (orice numar - el insusi=0)
(3⁸)⁷ - 9²⁸ = 3⁵⁶-3⁵⁶=0