CBSE Class 9 Answered
if a+b+c=9 and ab+bc+ca=23 then a square + b square + c squarE =
Asked by RUDRA YADAV | 15 Sep, 2013, 08:30: PM
Expert Answer
(a+b+c)2= a2+b2+c2+ 2ab+ 2bc+ 2ca
92= a2+b2+c2+ 2(ab+bc+ca)
81= a2+b2+c2+ 2(23)
81 = a2+b2+c2+ 46
a2+b2+c2= 35
Answered by | 15 Sep, 2013, 11:01: PM
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