Odpowiedź :
[tex] - 2 + 2a \times ( - 2) - (2c - a - 2) - (a - c) + c \times ( - 2a) \times ( - 2) + 2a = - 2 - 4a - 2c + a + 2 - a + c + 4a c + 2a = 4ac - 2a - c[/tex]
[tex] - 2 + 2a \times ( - 2) - (2c - a - 2) - (a - c) + c \times ( - 2a) \times ( - 2) + 2a = - 2 - 4a - 2c + a + 2 - a + c + 4a c + 2a = 4ac - 2a - c[/tex]