# Week 14 Blog

Things i learned this week: when we solve rational expressions, we need to find their common denominator.

For example:

$\frac{$latex x^2\$+2 over}{$x^2$ -x-6 over }

{$x^2$ -x-6 over }   can be factored into $x^2$-x-6=0

(x-3)(x+2)=o

x=3, x=-2

if we found the common denominator,then we can factor it, that’s the way how we solved this kind of equation.