4 per x + 3 - 5per x - 1 =

[tex] \frac{4}{x + 3} - \frac{5}{x - 1} \\ = \frac{4(x - 1) - 5(x + 3)}{(x + 3)(x - 1)} \\ = \frac{4x - 4 - 5x - 15}{x ^{2 } - x + 3x - 3 } \\ = \frac{4x - 5x - 4 - 15}{x ^{2} + 2x - 3 } \\ = \frac{ - x - 19}{x ^{2} + 2x - 3 } [/tex]

Maaf Kalau Salah