Question

Prove that LHs=RHS a³+b³+c³-3abc=(a+b+c)(a²+b²+c²-ab-bc-ca)

Answer 1

hi friend,

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(a+b+c)(a²+b²+c²-ab-bc-ca)

=a³+ab²+ac²-a²b-abc-ca²+ba²+b³+bc²-ab²-b²c-abc+a²c+b²c+c³-abc-bc²-ac²

=a³+b³+c³-3abc

hence proved

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I hope this will help u :)

Answer 2

hope its helped u.....,