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CBSE Class 9 Answered

explain
Asked by | 05 Jun, 2009, 11:10: PM
answered-by-expert Expert Answer

a2+b2+c2-ab-bc-ca=1/2(2a2+2b2+2c2-2ab-2bc-2ca)=1/2[(a-b)2 +(b-c)2 +(c-a)2 ]

Clearly the expression is always non negetive for real a,b & c

Answered by | 07 Jun, 2009, 12:55: AM
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