# Factoring Limits

by PowerBuilder
Tags: factoring, limits
 P: 10 Okay so I've been teaching myself (with the aid of the mighty internet & several friends) algebra & now calculus. I have found that I didn't do too good at high school for various reasons. Some good...some not good. Anyway... I have a (what is probably a basic question) about factoring limit questions. I understand that with an equation like below (which results in 0, you need to factor it) Lim x^2 -5x - 6 x->2 ------------ x^2 - 4 factored it works out to (x-3)(x-2). I can manage that. What is the approach taken when you have something like Lim x^2 + 3x -24 x->4 ------------ x^2 + 8 I don't know what to do in a situation like this, I don't know how to break it into a (x a)(x b) situation. I hope this thread isn't looked at & thought 'what a twit' I should say that I am aware of the quadratic equation............
 P: 389 In this problem you can actually just substitute $x = 4$ since the result is defined (no 0 in the denominator or an infinity anywhere) :)

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