Odpowiedź :
Hej!
2a(a + 3) = 2a * a + 2a * 3 = 2a² + 6a
3(5c - 1) = 3 * 5c - 3 * 1 = 15c - 3
5b(-a + 4) = 5b * (-a) + 5b * 4 = -5ab + 20b
10(a - 2c) = 10 * a - 10 * 2c = 10a - 20c
Pozdrawiam! - Julka
Hej!
2a(a + 3) = 2a * a + 2a * 3 = 2a² + 6a
3(5c - 1) = 3 * 5c - 3 * 1 = 15c - 3
5b(-a + 4) = 5b * (-a) + 5b * 4 = -5ab + 20b
10(a - 2c) = 10 * a - 10 * 2c = 10a - 20c
Pozdrawiam! - Julka