Объяснение:
a(a-2)/(a²-64) - 3/(a-8) = [a(a-2)-3(a+8)] / (a-8)(a+8)=
=(a²-2a-3a-24) / (a-8)(a+8)= (a-3)(a+8) / (a-8)(a+8) = (a-3)/(a-8)
