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cat face (5^42-5^41-5^40):(25^19ori19)


Răspuns :

5⁴⁰ ( 5² - 5¹ - 5° ) ÷ ( 25¹⁹× 19 ) = ( 5⁴⁰ × 19 ) ÷ ( 25¹⁹ × 19 ) = 5⁴⁰ ÷ 25¹⁹ = 5⁴⁰ ÷ 5³⁸ = 5² = 25
dau factor comun 5^40
5^40(5^2-5^1-1):25^19*19
5^40*19:5^38*19=5^(40-38)=5^2