Answers

2015-02-03T21:09:02+05:30
In mathematics an identity is an equality relation a=b,such as a and b contains some varieables.and a and b produce the same value  as each other regardless of what values [usual numbers] and substituted for varieables.in other words,a=b is an identity if a and b definites the same function.this means that an identity is an equality between functions that are differently defined.
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2015-02-04T12:34:35+05:30
(a+b+c)(a²+b²+c²-ab-bc-ca) = a³+b³+c³-3abc
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