Question 422883
This one is MUCH easier than it looks!!  You have to ask yourself, "What makes a fraction UNDEFINED?"  The answer is "DENOMINATOR = ZERO."  


So, make the denominator equal to zero (which we ALL know is NEVER really allowed in math!!), and solve the equation.


{{{x^2 - 4 = 0}}}
{{{(x-2)(x+2)=0}}}


x= 2 or x= -2


Dr. R^2