Question 837473
the difference of two integers is 9. The sum of their square is 261. find the two integers 
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n-m=9
n=m+9
n^2+m^2=261
sub n
(m+9)^2+m^2=261
m^2+18m+m^2=261
2m^2+18m=180
2m^2+18m-180=0
m^2+9m-90=0
(m-6)(m+15)=0
m=-15(reject, m > 0)
m=6
n=m+9=15
the two integers: 6 and 15