Вправи: 1226

1226. Розкрийте дужки:

1) –2a(m + 1,2n – 3,5k) = –2am – 2,4an + 7ak;

2) (1,5a + 3b + 3,6) • (–2c) = –3ac – 6bc – 7,2c;

3) (58a – 116b – 223c) • 24 = 58a • 24 – 76b • 24 – 83c • 24 = 15a – 28b – 64c;

4) –15k • (–116 – 29m + 2,4n) = –15k • (–76) – (–15k) • 29m + (–15k) • 2,4n = 352k + 103mk – 36nk = 1712k + 313mk – 36nk.