Odpowiedź :
A) (x + 4) (x + 3) = x^2 + 3x + 4x + 12 = x^2 + 7x + 12
C) (p + q) (q - 2p) = pq - 2p^2 + q^2 - 2pq = -2p^2 + q^2 - pq
E) (a + 3b) (3a - 2b) = 3a^2 - 2ab + 9ab - 6b^2 = 3a^2 + 7ab + 6b^2
A) (x + 4) (x + 3) = x^2 + 3x + 4x + 12 = x^2 + 7x + 12
C) (p + q) (q - 2p) = pq - 2p^2 + q^2 - 2pq = -2p^2 + q^2 - pq
E) (a + 3b) (3a - 2b) = 3a^2 - 2ab + 9ab - 6b^2 = 3a^2 + 7ab + 6b^2