Question

what is the zero of the function f(x)

Answer 1

consider this function
\[f(x)=\frac{ (x-a)(x-b)(x+c) }{ (x-m)(x-n)(x+p) }\]
for this function
\[zeroes~are ~Z=a,b,-c\]

Answer 2

for zeroes u have to equate terms in numerator to zero
like
x-a=0
x=a
x-b=0
x=b
loke this
and for poles u have to equate terms in denominator to zero

Answer 3

zeroes are the values of the function for which the function itself becomes zero
and poles are the values of the function for which the function becomes infinity