a)
[tex] \frac{x + 3}{x} = \frac{ - 3 \times 3}{ - 3} = \frac{ - 9}{ - 3} = 3[/tex]
b)
[tex] - 5 {x}^{2} - x = - 5 \times ( { - 3})^{2} - ( - 3) = - 5 \times 9 + 3 = - 45 + 3 = - 42[/tex]
c)
[tex] - 2x + 5 = - 2 \times - 3 + 5 = 6 + 5 = 11[/tex]
d)
[tex] \frac{x + 1}{x - 1} = \frac{ - 3 + 1}{ - 3 - 1} = \frac{ - 2}{ - 4} = \frac{1}{2} [/tex]
Myślę że pomogłem ;)
