Question 208686
Well a rational function is undefined only when its denominator equals to zero so to find where its undefined we will set the denominator equal to 0.

p^2-49=0

And now we solve this basic quadratic equation.  Start by adding 49 to both sides.

p^2-49+49=0+49
p^2 = 49

Now we take the square root of both sides.

p = +/- 7

And thats your answer, the above rational function is undefined at -7 and 7