Question

3. How many constants can a polynomial have? Explain your answer

Answer 1

Only one.  A polyn. features powers of the unknown x in descending order.

5x^5 + 3x^2 + x^1 + 1x^0 is an example.  Note the descending powers of x are

x^5, x^2, x^1 and x^0.  x^0 = 1 and this is the ONLY constant in the polynomial.