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Algebric question

Posted November 27th, 2009 by learningmaths
in

what is the equation of $ (A+B)^3=A^3+3A^2B+3AB^2+B^3 $ ? and could someone prove the equation also?

‹ que. Logarithm ›

Comments

Answer:

On November 27th, 2009 alpha says:

$ (A+B)^3=A^3+B^3+3AB(A+B) $
Proof:
$ (A+B)^3=(A+B)^2(A+B) $
$ RHS=(A^2+B^2+2AB)(A+B) $
$ RHS=A^3+B^3+3AB(A+B) $

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``Old theorems never die; they turn into definitions.''
----E. Hewitt

''ALPHA" =)

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