6a³ - 4a² - 5a³ + 6a² = a³ + 2a² = (-2)³ + 2*(-2)² = -8 + 2*4 = -8 + 8 = 0Ответ: 0
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6a³ - 4a² - 5a³ + 6a² = a³ + 2a² = (-2)³ + 2*(-2)² = -8 + 2*4 = -8 + 8 = 0
Ответ: 0