[racket] Rusty Math

I was doing an exmple and thinking about my expected retrun value to kow if
my function worked.

However I don't think any value could test true therefore my function would
always be false. I do need to double check though as my math is rusty. But
you cannot square a number and have it retun negative can you?

This is my working.

;;; equation : number --> boolean
;;; to determine whether n is true for the equation (2 - n(squared) = 102)
(define (forn x)
  (= (- 2 (* x x) ) 102))
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