my little brother just came over with a math problem. i tried to help his as best I could (i failed 2 years of algebra in college) so i told him i would ask online. here is the problem: He wants to simplify the square root of 72, and put it in simplest form. I dont know the computer keyboard equivalent for the square root, so I'll use the "^" key. Here is what I got: ^72 = 9*8=72 therefore ^9^8 and therefore 3^8. (square root of 9 is 3) He told me he got the same thing, but the answer in the back of the book says the answer is 6^2 Which 36*2=72 (^36^2), but 9*8=72 (^9^8) as well. Anybody help? How is the last one correct?