Respuesta :

[tex]\cfrac{8^2-4}{72}\implies \cfrac{64-4}{72}\implies \cfrac{60}{72}\implies \cfrac{12\cdot 5}{12\cdot 6}\implies \cfrac{12}{12}\cdot \cfrac{5}{6}\implies 1\cdot \cfrac{5}{6}\implies \cfrac{5}{6}[/tex]

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