题目有误,最前面的系数应该是a^2
a^2x^2-(3a^2-8a)x+(2a-3)(a-5)=0
[ax-(2a-3)][ax-(a-5)]=0
x=2-3/a,x=1-5/a
要使方程有整数根,3/a,5/a为整数.