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2015-04-11 01:08:45 +0200 | commented answer | Why is sage giving me wrong answers? @Pierre Thanks a lot. It works now...but I don't really understand what you mean when you say "Do not use floating points". I just wrote the numbers as they were...what do you mean by "floating points"? |

2015-04-11 00:39:58 +0200 | asked a question | Why is sage giving me wrong answers? Let's say I want to multiply $(\frac{-1 - i \sqrt{3}}{2})(\frac{-1 + i \sqrt{3}}{2})$. Doing it by hand, we easily see that the answer is 1. However, when I type n(((-1 + sqrt(-3))/2)*((-1-sqrt(-3))/2)) in sage, I get 1 - 5.55111512312578 x 10^(-17)i which is (of course) very close to 1...but its not exactly 1. Why is that? How do I fix this?? |

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