2/a-1 + 4/a+2 = (jawab please :()

[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} + 2a - a - 2 } \\ = \frac{2a + 4a + 4 - 4}{a ^{2} + a - 2} \\ = \frac{6a}{a ^{2} + a - 2 } [/tex]

Maaf Kalau Salah

2/a-1 + 4/a+2 =
= 2(a+2)/(a-1)(a+2) + 4(a-1)/(a-1)(a+2)
= 2(a+2) + 4(a-1)
_____________
(a-1)(a+2)

= 2a + 4 + 4a - 4
_____________
a^2 + 2a - a -2

= 6a
_______
a^2 + a - 2