SOLUTION: Add or subtract. Then simplify by collecting like radical terms, if possible. 21sqrt5 - 13sqrt5

Algebra ->  Square-cubic-other-roots -> SOLUTION: Add or subtract. Then simplify by collecting like radical terms, if possible. 21sqrt5 - 13sqrt5      Log On


   

Question 204609: Add or subtract. Then simplify by collecting like radical terms, if possible.
21sqrt5 - 13sqrt5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
21sqrt5-13sqrt5
(21-13)sqrt5
8sqrt5 ans.