Odpowiedź:
[tex] {3x }^{2} + 3x - 2x - 2 = {3 \times }^{2} - 5 \\ {3 \times }^{2} + \times - 2 = {3 \times }^{2} - 5 \\ \times - 2 = 5 \\ \times = 7[/tex]
