Register to reply

Factoring Limits

by PowerBuilder
Tags: factoring, limits
Share this thread:
PowerBuilder
#1
Dec11-11, 02:59 AM
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............
Phys.Org News Partner Science news on Phys.org
Fungus deadly to AIDS patients found to grow on trees
Canola genome sequence reveals evolutionary 'love triangle'
Scientists uncover clues to role of magnetism in iron-based superconductors
JHamm
#2
Dec11-11, 04:31 AM
P: 389
In this problem you can actually just substitute [itex]x = 4 [/itex] since the result is defined (no 0 in the denominator or an infinity anywhere) :)


Register to reply

Related Discussions
Factoring question - generalized factoring in integers Linear & Abstract Algebra 0
L'Hopitals rule and application in limits and limits Calculus & Beyond Homework 2
Help with factor large numbers Precalculus Mathematics Homework 6
How to factor 6x^2-11x+4 Precalculus Mathematics Homework 4
LIMITS, complicated square roots and factoring General Math 3