Why is sqrt (9) = 3 and not -3?

There's so much to this question that you'll find interesting. Your main question is a matter of mathematical convention and how mathematics is taught in schools. You may be surprised to learn …

Long's Digest   Top Stories For You   Why is sqrt (9) = 3 and not -3? Matthew Geleta, MSc Mathematics & Computer Science, University of Oxford (2017) • Updated June 20, 2020 There's so much to this question that you'll find interesting. Your main question is a matter of mathematical convention and how mathematics is taught in schools. You may be... Read More » 603K 709 32   How serious is the Chinese military? Jimmy Qu, Construction Manager (2019-present) • Answered October 2 If you don't like China, please keep believe China is a large version of North Korea, make cheap and not quality items, and everything China made will not last very long in... Read More » 30.5K 180 56   Is France a powerful country? Dahyun Kim, History Buff • Answered October 23 YES. Here are 4 reasons why France is a powerful country. Military France is in fact a superpower…technically speaking. It is one of three countries (the other two being USA ... Read More » 270.7K 332 114   See more of what you like and less of what you don't. Tune your digest     Did Germany know about Pearl Harbor? Wes Frank, Masters in American History from Northwestern University • Updated November 11 Adolf Hitler and the German high command were aware that Japan was planning some sort of attack in East Asia in the fall of 1941, but the Japanese military practiced very t... Read More » 89.7K 998 25   Why has China never apologized for the Korean War? Benjamin Kirk, Interested in History and Geopolitics • Answered October 13 Because they think it's Justified China attacked just as it seems the North Korea was nearly lost, by this Point, UN Troops had already reached the Yalu River, one of the tw... Read More » 109.2K 273 141 Read More in Your Feed

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