Prove the following identities- a+b+c-c-b-ca+b+c-c-b-aa+b+c = 2(a+b)(b+c)(c+a)

Prove the following identities- $|\begin{matrix} a + b + c & - c & - b \\ - c & a + b + c & - c \\ - b & - a & a + b + c \end{matrix}| = 2 (a + b) (b + c) (c + a)$

Matching exercise

Match the items on the right to the items on the left.

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