a ^ { 3 } - b ^ { 3 } + 8 c ^ { 3 } + c – InterviewSolution

1.	a ^ { 3 } - b ^ { 3 } + 8 c ^ { 3 } + c
Answer» (a)³ +(-b)³ +(2c)³ - 3(a)(-b)(2c) = (a-b+2c)(a²+b²+4c² +ab +2bc -2ca)

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