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If 2s =a+b+c,prove that, |{:(" "a^2,(s-a...

If 2s =a+b+c,prove that, `|{:(" "a^2,(s-a)^2,(s-a)^2),((s-b)^2," "b^2,(s-b)^2),((s-c)^2,(s-c)^2," "c^2):}|=2s^3(s-a)(s-b)(s-c)`

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The correct Answer is:
`[because ` x=s-a,y=s-b,z=s-c,x+y+z=s]
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