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March 8th, 2019, 05:08 AM  #1 
Senior Member Joined: Nov 2011 Posts: 250 Thanks: 3  plusminus before a (for example, squareroot)
"The paper 'bear' everything" Are there examples in abstract math that we cannot put plusminus sign before a root? For example, when we calculating the solutions of quadratic equation we use the sign. So, when we don't use it in the Realm of Abstract Algebra? Last edited by shaharhada; March 8th, 2019 at 05:14 AM. Reason: grammar correction 
March 8th, 2019, 07:33 AM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,696 Thanks: 2681 Math Focus: Mainly analysis and algebra 
Any time we don't want to say "plus or minus".

March 8th, 2019, 07:43 AM  #3 
Senior Member Joined: Nov 2011 Posts: 250 Thanks: 3  response So every question in Abstract Algebra can always can plus or minus and there are no question that if it is not mentioned exactly what the want? (2) So, there also not hints in Abstract Algebra Realm, so you can see that you can only use only plus or only minus? (I mentioned it cannot be seem in explicit instruction of the question)? 
March 8th, 2019, 09:26 AM  #4  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,340 Thanks: 983 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan  

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