By using the properties of determinants show that $(i) \begin{vmatrix} a-b-c&2a&2a \\ 2b&b-c-a&2b \\ 2c&2c&c-a-b \end{vmatrix} = (a+b+c)^3$

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Note: This is part 1 of a 2 part question, split as 2 separate questions here.