Question

What number(s) should be excluded as values of x in the polynomial? x+2 over x^2-4

Answer 1

this is not a polynomial, its a rational expression. Since dividing by 0 is undefined, you need to find the values of x that make this expression undefined, which will happen when x^2-4=0

Answer 2

x+2
---------- = 1/(x-2)
(x+2)(x-2)