Rational Expressions: Solving Homework with Difficulty

[Annie_D]

Homework Statement

x (squared) + x - 30
_____________________
x (sqaured) -3x + 2

Find all numbers for which the rational expression is not defined.

i know this is really easy stuff, but i have a hard time staying focused in math, and i have to always teach myself with the book, but sometimes the book isn't very informative.

I have the answer, but don't know how to go about doing these problems. I know you like people to attempt them, but i don't even know where to begin after factoring the 30 .

 

[statdad]

When is a rational expression (a fraction) not defined? For what value is division impossible?

 

[Annie_D]

0, i got in now though. thanks anyway.

 

[Mark44]

So for what x will x² - 3x + 2 = 0? You need to factor this trinomial to answer that question.