Раскройте скобки.
1) 3(a − 2b);
2) −2(3m − 5n + 4p);
3) (x − 7y − 3z) * (−0,4);
4) −0,6d(−6a − 8b + 9c);
5) $-18(\frac{1}{6}m - \frac{5}{9}n + \frac{2}{3}p)$;
6) $\frac{2}{3}a(9b - 12c - 6d)$.
3(a − 2b) = 3 * a − 3 * 2b = 3a − 6b
−2(3m − 5n + 4p) = −2 * 3m − (−2) * 5n + (−2) * 4p = −6m + 10n − 8p
(x − 7y − 3z) * (−0,4) = x * (−0,4) − 7y * (−0,4) − 3z * (−0,4) = −0,4x + 2,8y + 1,2z
−0,6d(−6a − 8b + 9c) = −0,6d * (−6a) − (−0,6d) * 8b + (−0,6d) * 9c = 3,6ad + 4,8bd − 5,4cd
$-18(\frac{1}{6}m - \frac{5}{9}n + \frac{2}{3}p) = -18 * \frac{1}{6}m - (-18) * \frac{5}{9}n + (-18) * \frac{2}{3}p = -3 * \frac{1}{1}m - (-2) * \frac{5}{1}n + (-6) * \frac{2}{1}p = -3m + 10n - 12p$
$\frac{2}{3}a(9b - 12c - 6d) = \frac{2}{3}a * 9b - \frac{2}{3}a * 12c - \frac{2}{3}a * 6d = \frac{2}{1}a * 3b - \frac{2}{1}a * 4c - \frac{2}{1}a * 2d = 6ab - 8ac - 4ad$