Analytically determine all possible quadruplets (p, q, r, s) of real numbers satisfying the following system of equations:

p+q = 8
pq + r + s = 23
ps + qr = 28
rs = 12

p   q    r   s

5 3   6 2

3  5   2 6

    any more?

Posted by Ady TZIDON on 2007-04-06 11:54:07