Question 1209317
<pre>

Something is wrong because:

      f(x+y) = x + f(y) + f(y^2) - y^2

Let x = y = 0

      f(0+0) = 0 + f(0) + f(0^2) - 0^2

        f(0) = 0 + f(0) + f(0) - 0

        f(0) = 2f(0)
 
f(0) - 2f(0) = 0
       
       -f(0) = 0

        f(0) = 0

So f(0) cannot equal -5

Edwin</pre>