Question 276188
n^2+(n+4)^2=136
n^2+n^2+8n+16=136
2*(n^2+4n+8)=136
n^2+4n+8=68

n^2+4n-60=0
(n+10)*(n-6)=0
n=6 n=-10
(6,8,10) and (-10,-8,-6)
6^2+10^2=136