Hej!
Zadanie 1 :
(p - 3)(5p - 5r + 8) =
= 5p² - 5pr + 8p - 15p + 15r - 24 =
= 5p² - 5pr - 7p + 15r - 24
Zadanie 2 :
(4x - 5y) - (6x - 7y) =
= 4x - 5y - 6x + 7y = -2x + 2y
Zadanie 3 :
3(4p - 6s) - 5(5p + 7s) =
= 12p - 18s - 25p - 35s = -13p - 53s
Zadanie 4 :
3p(5r - 5p + 6) = 3p * 5r - 3p * 5p + 3p * 6 =
= 15pr - 15p² + 18p
Zadanie 5 :
(x + 3)(x - 4) = x² - 4x + 3x - 12 =
= x² - x - 12
Zadanie 6 :
5x - 4y + 6x - 7y = 11x - 11y
Pozdrawiam! - Julka