a(b-c)+b(c-a)+c(a-b)
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hye
==================
a(b-c)+b(c-a)+c(a-b)
lets multiplly it
=> ab - ac +bc - ab +ac - bc
=>[ab - ab][ -ac +ac] +[bc-bc]
=> 0
=========================
hope it helps u........
==================
a(b-c)+b(c-a)+c(a-b)
lets multiplly it
=> ab - ac +bc - ab +ac - bc
=>[ab - ab][ -ac +ac] +[bc-bc]
=> 0
=========================
hope it helps u........
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