What is considered most "simple" My professor this year in multiariable calculus made a very argument for why you shouldn't leave something in "exact form". All previous years I was told to leave something in "exact form" because it's more exact. For example on a exam this squareroot(2) is correct and not about 1.4... (whatever it is I can't remember) because 1.4... is only a approximation and is therefore incorrect and squareroot(2) is correct because it not a approximation but only the correct answer. My professor argued that squareroot(2) is not simple enough because it's a operation on a number. I found this odd because like I said I was always told to leave it in "exact form" because it was more correct. He argued that you wouldn't leave something like this integral[2,4] x^2 dx on a test so then why leave squareroot(2) as a answer on a test? Both are operations on a argument. I found this rather persuasive but it contradicts what I've always been told. Even when I was in high school and taking AP Calculus I believe I would of lost points if I put numerical approximations and not the "exact form" of an answer. I'm not exactly sure which one is correct or more simple and what I should put on a test next semester because I have a different professor.