1. ## factor

could someone show me how to factor

x^2-4

2. Originally Posted by VonNemo19
could someone show me how to factor

x^2-4
Difference of two squares - Wikipedia, the free encyclopedia

This is a common type of quadratic and you can use the identity in the link above:

$a^2-b^2 = (a-b)(a+b)$

In your case it is easy enough to see that x=a and 2=b

$(x-2)(x+2)$