Раскройте скобки: 1) 4(5x + 9y - 2); 2) -6(-a - 8b + 7c); 3) (6p - n - 4m) * (-1.6); 4) (-2.6a - b + 1.4c) * (-m); 5) 0.7m(7a - 2.1 + 5k); 6) -24(\frac{7}{12}x + 0.5y - \frac{5}{6}z - 0.3)

1) 4(5x + 9y - 2) = 4 * 5x + 4 * 9y - 4 * 2 = 20x + 36y - 8 2) -6(-a - 8b + 7c) = -6 * (-a) - 6 * (-8b) - 6 * 7c = 6a + 48b - 42c 3) (6p - n - 4m) * (-1.6) = 6p * (-1.6) - n * (-1.6) - 4m * (-1.6) = -9.6p + 1.6n + 6.4m 4) (-2.6a - b + 1.4c) * (-m) = -2.6a * (-m) - b * (-m) + 1.4c * (-m) = 2.6am + bm - 1.4cm 5) 0.7m(7a - 2.1 + 5k) = 0.7m * 7a - 0.7m * 2.1 + 0.7m * 5k = 4.9am - 1.47m + 3.5km 6) -24(\frac{7}{12}x + 0.5y - \frac{5}{6}z - 0.3) = -24 * \frac{7}{12}x - 24 * 0.5y + 24 * \frac{5}{6}z + 24 * 0.3 = -14x - 12y + 20z + 7.2 Ответы: 1) 20x + 36y - 8 2) 6a + 48b - 42c 3) -9.6p + 1.6n + 6.4m 4) 2.6am + bm - 1.4cm 5) 4.9am - 1.47m + 3.5km 6) -14x - 12y + 20z + 7.2