Question 238663
simplify by removing a factor equal to 1 
r^2-4/3r+6
---------------
Factor where you can:
[(r-2)(r+2)/3(r+2)]
---
= [(r-2)/3]*[(r+2)/(r+2)]
---
= [(r-2)/3]*1
---
= (r-2)/3
=====================
Cheers,
Stan H.