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rudnickijbogdan764
@rudnickijbogdan764
July 2023
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Знайдіть числове значення виразу: (5N-x)²-(5N+x)(5N-x), якщо x=-1.
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Kormash
(5N-x)²-(5N+x)(5N-x), якщо x=-1.
(5N-(-1))²-(5N+(-1))(5N-(-1)) = (5N+1) ² - (5N-1) • (5N+1) = 25N ²+10N+1-25N ²+1) = 10N + 2
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(5N-(-1))²-(5N+(-1))(5N-(-1)) = (5N+1) ² - (5N-1) • (5N+1) = 25N ²+10N+1-25N ²+1) = 10N + 2