Найдите удвоенное произведение одночленов: 1) $a^2$ и 3b; 2) 5x и 6y; 3) 0,5m и 4n; 4) $\frac{1}{3}m^2$ и 6m.
$2(a^2 * 3b) = 2 * 3a^2b = 6a^2b$
2(5x * 6y) = 2 * 30xy = 60xy
2(0,5m * 4n) = 2 * 2mn = 4mn
$2(\frac{1}{3}m^2 * 6m) = 2 * 2m^3 = 4m^3$
