Question

how many zeros of the polynomial ax+b are there?Also find its zeros.

Answer 1

      ax+b
  here 'a' and 'b' are two constants and 'x' is a variable.
 so, ax+b=0
 or   ax=(-b)
 or    x=(-b/a)
Thus, it has only 1 zero.

Answer 2

ax + b = 0
ax= -b
x = -b/a.

and your Question is wrong. the question will be how many zero of the polynomial not zeros.