Question 41110
5/(a^2 - 4) - 2/(a^2 - 3a + 2)
= (5(a-1) - 2(a+2))/((a+2)(a-2)(a-1))
= (5a-5 - 2a-4)/((a+2)(a-2)(a-1))
= {{{(3a-9)/((a+2)(a-2)(a-1))}}}