a³ + b³ = (a + b)(a² - ab +b²)
a² - b² = (a - b)(a + b)
x³ + 27 = x³ + 3³ = (x + 3)(x² - 3x + 9)
((x³ + 27)/(x² - 3x + 9)² - (x - 3)² = ((x + 3)(x² - 3x + 9)/(x² - 3x + 9))² - (x - 3)² = (x + 3)² - (x - 3)² = (x + 3 + x - 3)(x + 3 - x + 3) = 2x*6 = 12x
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a³ + b³ = (a + b)(a² - ab +b²)
a² - b² = (a - b)(a + b)
x³ + 27 = x³ + 3³ = (x + 3)(x² - 3x + 9)
((x³ + 27)/(x² - 3x + 9)² - (x - 3)² = ((x + 3)(x² - 3x + 9)/(x² - 3x + 9))² - (x - 3)² = (x + 3)² - (x - 3)² = (x + 3 + x - 3)(x + 3 - x + 3) = 2x*6 = 12x
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Ответ:
Объяснение:...............