Rozwiąż równanie:
(5a+1)² + (5a-1)² - (5a+1)(5a-1) - 25a²
25a^2 + 10a + 1 + 25a^2 - 10a + 1 - 25a^2 - 5a + 5a -1 - 25a^2 = 1
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25a^2 + 10a + 1 + 25a^2 - 10a + 1 - 25a^2 - 5a + 5a -1 - 25a^2 = 1