Смотри вложение......
4(a - b)² - (a + b)² = (2(a - b))² - (a + b)² = (2(a - b) - a - b)(2(a - b) + a + b) =
= (2a - 2b - a - b)(2a - 2b + a + b) = (a - 3b)(3a - b)
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Verified answer
Смотри вложение......
Verified answer
4(a - b)² - (a + b)² = (2(a - b))² - (a + b)² = (2(a - b) - a - b)(2(a - b) + a + b) =
= (2a - 2b - a - b)(2a - 2b + a + b) = (a - 3b)(3a - b)