5a+1和a-19是正数m的的平方根,相反
(5a+1)+(a-19)=0
a=3
m=(5*3+1)^2=256
5a+1和a-19是正数m的的平方根,相等
5a+1=a-19
a=-5
m=(-5*5+1)^2=576