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If a2+b2+c2=74and ab+bc+ca=62finda+b+c |
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Answer» ca=10, find the value of a+b+cAnswerFormula,(a+b+c) 2 =a 2 +b 2 +c 2 +2ab+2bc+2ca⇒(a+b+c) 2 =a 2 +b 2 +c 2 +2(ab+bc+ca)Given,ab+bc+ca=10,a 2 +b 2 +c 2 =16⇒(a+b+c) 2 =16+2(10)a+b+c= 16+20 =6 |
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