t(t-1)
169 squared is 28,561. 28,561 squared is: 815,730,721
X squared + 7X + 12?
5 squared + 12 squared = 169 (13 squared)
169
13 squared (13 x 13) = 169
-5
5
13 squared = 169
13X squared + 7X + 12
What about it? Factorise it?
It is: x(x-3) factorized