Obliczenia :
¾x + 6 = ¾ * 12 + 6 = 3 * 3 + 6 = 9 + 6 = 15
2x² + 3y - 1 = 2 * 4² + 3 * (-2) - 1 =
= 2 * 16 - 6 - 1 = 32 - 7 = 25