prove that (m-n-2) [(m+n)^2 + (-n+2)^2 + (-2-m)^2] = 2(m^3 + n^3 -8 - 6mn)

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vijay89
March 30, 2017, 7:48 p.m.

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Mohit Passi
March 30, 2017, 4:58 p.m.
Please check the equation again. There may be mistake of sign.
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