1) 12a³x - 36a²bx + 27ab²x = 3ax (4a² - 12ab + 9b²) = 3ax (2a - 3b)²; 2) 2a²b³ - 28ab² + 98b = 2b (a²b² - 14ab + 49) = 2b (ab - 7)²
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1) 12a³x - 36a²bx + 27ab²x = 3ax (4a² - 12ab + 9b²) = 3ax (2a - 3b)²; 2) 2a²b³ - 28ab² + 98b = 2b (a²b² - 14ab + 49) = 2b (ab - 7)²