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25 November, 22:47

If a square + b square + c square minus ab minus bc minus ca equals to zero, prove that A equals to B equal to C

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  1. 26 November, 00:13
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    A^2 + b^2 + c^2 - ab - bc - ca = 0

    a. a + b. b + c. c = a. b + b. c + c. a

    equating term by term:-

    a = b

    b = c

    c = a

    Therefore a = b = c
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