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Аnоnимm
@Аnоnимm
July 2022
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Срочно, помогите решить. Третий номер
Тема Разность квадратов
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Verified answer
71 * 69 = (70 + 1) * (70 - 1) = 70² - 1² = 4900 - 1 = 4899
82 * 78 = (80 + 2) * (80 - 2) = 80² - 2² = 6400 - 4 = 6396
299 * 301 = (300 - 1) * (300 + 1) = 300² - 1² = 90000 - 1 = 89999
51 * 49 = (50 + 1) * (50 - 1) = 50² - 1² = 2500 - 1 = 2499
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Answers & Comments
Verified answer
71 * 69 = (70 + 1) * (70 - 1) = 70² - 1² = 4900 - 1 = 489982 * 78 = (80 + 2) * (80 - 2) = 80² - 2² = 6400 - 4 = 6396
299 * 301 = (300 - 1) * (300 + 1) = 300² - 1² = 90000 - 1 = 89999
51 * 49 = (50 + 1) * (50 - 1) = 50² - 1² = 2500 - 1 = 2499