Tolong jawab 2/a-1+4/a+2=

[tex] \frac{2}{a - 1} + \frac{4}{a + 2} \\ = \frac{2(a + 2) + 4(a - 1)}{(a - 1)(a + 2)} \\ = \frac{2a + 4 + 4a - 4}{ {a}^{2} + a - 2} \\ = \frac{2a}{ {a}^{2} + a - 2}[/tex]