Question

(С-2)(с+2)
(12-х)(12+х)
(3х-у)(3х+у)
(10m-7)(10m+7)

Answer 1

Ответ:

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(c - 2)(c + 2) = c² - 2² = c² - 4

(12 - x)(12 + x) = 12² - x² = 144 - x²

(3x - y)(3x + y) = (3x)² - y² = 9x² - y²

(10m - 7)(10m + 7) = (10m)² - 7² = 100m² - 49

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Разложили по ФСУ

(a + b)(a - b) = a² - b²