Hi, I need help with this equation!

$\displaystyle \frac {9} {x-10} - \frac {210}{x^2 -100} = 1 $

I have tried to cross multiply and factor the question and end up with

$\displaystyle x(-9x^2-9x+1200) = 0 $

If that is in the ballpark can you help me factor that or am I completely wrong?

The book asks for

Solutions arex1= andx2= .Important Note:x1 denotes the smaller solution.