sederhanakan 2 per a-1 ditambah 1 per a + 1 adalah?

2/(a-1) + 1/(a+1) = 2(a+1)/(a-1)(a+1) + (a-1)/(a-1)(a+1) = 2(a+1) + (a-1)/(a-1)(a+1) = 2a+1+a-1/(a²+a-a-1) = 3a/a²-1