Odpowiedź:
a)
[tex]3x + 4 = 3 \times ( - 2) + 4 = - 6 + 4 = - 2[/tex]
b)
[tex] - 8 - 2y = - 8 - 2 \times 3 = - 8 - 6 = - 14[/tex]
c)
[tex]2x + 3y - 6 = 2 \times 4 + 3 \times ( - 3) - 6 = 8 - 9 - 6 = - 7[/tex]
d)
[tex] \frac{1}{5} a(a - 2) = \frac{1}{5} \times 10 \times (10 - 2) = 2 \times 8 = 16[/tex]