A polynomial is a function of the form f(x)=anxn+an−1xn−1+...+a2x2+a1x+a0
where an,an−1,...a2,a1,a0 . are contants
and n is a natural number.
To find Zeroes :
p(x)=0
Given p(x)=x+9
⇒x+9=0
⇒x=−9
Hence, x=−9 is Zero of polynomial p(x).