Ответ:
(а²+3b )× (a⁴-3a²+9b²)= a⁶-3a⁴+9b²a²+3ba⁴-9ba²+27b³
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Ответ:
(а²+3b )× (a⁴-3a²+9b²)= a⁶-3a⁴+9b²a²+3ba⁴-9ba²+27b³