x³ - y³ = (x - y)(x² + xy + y²)
x² - y² = (x - y)(x + y)
(3a³ - 3b³)/(3a² - 3b²) = 3(a - b)(a² + ab + b²) / 3(a - b)(a + b) = (a² + ab + b²) / (a + b)
отввет В
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Verified answer
x³ - y³ = (x - y)(x² + xy + y²)
x² - y² = (x - y)(x + y)
(3a³ - 3b³)/(3a² - 3b²) = 3(a - b)(a² + ab + b²) / 3(a - b)(a + b) = (a² + ab + b²) / (a + b)
отввет В