Ответ:
Пошаговое объяснение:
1) am²- an² = a(m² - n²) = a( m - n)(m + n)
2) 9m² - (1 + 2m)² = (3m)² - (1 + 2m)² =
=(3m + 1 + 2m)(3m - 1 - 2m) = (5m + 1)(m - 1)
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Ответ:
Пошаговое объяснение:
1) am²- an² = a(m² - n²) = a( m - n)(m + n)
2) 9m² - (1 + 2m)² = (3m)² - (1 + 2m)² =
=(3m + 1 + 2m)(3m - 1 - 2m) = (5m + 1)(m - 1)