Odpowiedź:
a)
[tex]3x + 4 = 3 \times 3 + 4 = 9 + 4 = 13 \\ 3x + 4 = 3 \times ( - 2) + 4 = - 6 + 4 = - 2 \\ 3x + 4 = 3 \times \frac{1}{6} + 4 = \frac{1}{2} + 4 = 4 \frac{1}{2} [/tex]
B)
[tex] - 2x + {y}^{2} = - 2 \times 2 + {3}^{2} = - 4 + 9 = 5 \\ - 2x + {y}^{2} = - 2 \times ( - 4) + {5}^{2} = 8 + 25 = 33 \\ - 2x + {y}^{2} = - 2 \times \frac{5}{8} + {(0.5)}^{2} = - \frac{5}{4} + 0.25 = - \frac{5}{4} + \frac{1}{4} = - 1[/tex]
