Question

if a square+ b square+ c square=14and ab+bc+ca=11, then find the value of a+b+c . plzz give answer fastly

Answer 1

use a square+b square+c square formula a+b+c whole square is asquare+bsquare+csquare+2ab+2bc+2ca sub this all values                            
so that it will be 14+2*11   =14+22 =36                     

than square it =6

Answer 2

Use the formula-(a+b+c)square.. (a+b+c)square = a square +b square + c square + 2ab+2bc+2ca (a+b+c)square =14+2(ab+bc+ca) =14+2(11) =36 (a+b+c) = root 36 =6