Предмет: Алгебра, автор: Lax813

Решите пожалуйста e) пример

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Автор ответа: Banabanana

условие не переписываю

$= \frac{(49^2-29^2)+(22^2-2^2)}{(65-45)^2} = \frac{(49-29)(49+29)+(22-2)(22+2)}{20^2} = \\\\ =\frac{20*78+20*24}{20^2} =\frac{20(78+24)}{20^2} =\frac{102}{20} = \frac{51}{10}=5.1$

Ответ: 5,1

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