Respuesta :

  • Yes any real number including 0 can go through the boxes.
  • This is why because se there is a Coefficient namely 5x^4 in the expression.
  • So it will be added or multiplied with rest.
  • Then the expression will be surely a polynomial.
  • Another reason is there
  • On right box its 4x^?
  • So it can never be 0 so no harm to 5x^4.