You're not wrong at all. You just have to simplify
Look:
trying to find distance between 2 pts. using distance formula of
(1,4) (5,1)
I can get to the end of the problem, but the book says I'm wrong...
The answer I'm getting is the square root of 45, but the book says the answer is 3 times the square root of five.
Please tell me what I'm doing wrong.