Determine the number of integer solutions to:
x+ y + z = 15
Note:
The absolute value function F(x) = x is defined as:
x if x ≥ 0
F(x) =
x if x < 0
(In reply to
General Solution  Two geometric methods by Steve Herman)
Perhaps someone can do the algebra to prove
C(n1,2)*8 + (C(n+2,2)C(n1,2)3)*4 + 6 = 4*n^2 + 2
the LHS of which is the generalization of my method.

Posted by Charlie
on 20140220 09:56:14 