Respuesta :

sqdancefan

Answer:

  c = 22

Step-by-step explanation:

The given equation can be written as ...

  x^2 = 103 -c

In order for -9 and +9 to be solutions, the equation needs to be ...

  x^2 = 81

So, we must have ...

  103 -c = 81

  c = 103 -81 = 22

The value of c must be 22.