The values of m, n, for which the system of equations
x + y + z = 4,
2x + 5y + 5z = 17,
x + 2y + mz = n
has infinitely many solutions, satisfy the equation :
1
m2 + n2 – m – n = 46
2
m2 + n2 + m + n = 64
3
m2 + n2 + mn = 68
4
m2 + n2 – mn = 39
The values of m, n, for which the system of equations
x + y + z = 4,
2x + 5y + 5z = 17,
x + 2y + mz = n
has infinitely many solutions, satisfy the equation :