SOLUTION: Can someone please help me? My question is Find the LCM of r^2-81 and r^2+11r+18 Any and all help is greatly appreciated. Thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Can someone please help me? My question is Find the LCM of r^2-81 and r^2+11r+18 Any and all help is greatly appreciated. Thank you      Log On


   

Question 912824: Can someone please help me? My question is
Find the LCM of r^2-81 and r^2+11r+18
Any and all help is greatly appreciated.
Thank you
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
r%5E2-81
(r+9)(r-9)


and r^2+11r+18
r%5E2%2B9r%2B2r%2B18%29%0D%0A%0D%0A%7B%7B%7Br%28r%2B9%29%2B2%28r%2B9%29

%28r%2B9%29%28r%2B2%29

The LCM is the common factors multiplied by the non common factors
The LCM is ( r+9)(r+2)(r-9)