 
 The general form of an even number is 2n. So, odd number is 2n + 1 and 2n + 3. 
Now, we have as the follows, 
(2x + 1)(2x + 3) = 323 
Or, 4x^2 + 6x + 2x + 3 = 323 
Or, 4x^2 + 8x - 320 = 0
Or, x^2 + 2x - 80 = 0 
Hence, the quadratic equation established is 
 
 
 That's it..