simple math question...?

Question

I HAVE BAD MEMORY,,, DOES "FIND THE ZEROES OF A FUNCTION" MEAN FIND WHAT EACH UNKNOWN IS?... MEANING WHAT X AND Y IS..?
IF NOT,,, PLS EXPLAIN...

example, f(x)=2x+6

Answer 1

It means find the values of x that make f(x) = 0
In given example :-
f(x) = 2x + 6
f(x) = 0 when x = - 3
The zero of the function occurs when x = - 3.

Answer 2

The zeros of a functions are points for which the function returns the value 0.

For instance, let n be an integer.
Because sin(n*pi)=0 n*pi is a zero of function sin.