Prove that (x+y)^3+(y+z)^3+(z+x)^3-3(x+y)(y+z)(z+x)

1.	Prove that (x+y)^3+(y+z)^3+(z+x)^3-3(x+y)(y+z)(z+x)
Answer» ANSWER: USE the IDENTITY a³+b³+c³=3abc if a+b+c is ZERO

Answer»

ANSWER:

USE the IDENTITY

a³+b³+c³=3abc

if a+b+c is ZERO

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Prove that (x+y)^3+(y+z)^3+(z+x)^3-3(x+y)(y+z)(z+x)

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