Question: A2. Let K be an ordered field. Prove that 0 - a = 0, using only the axioms of an ordered field. You may use

A2. Let K be an ordered field. Prove that 0 - a = 0, using only the axioms of an ordered field. You may use the distributive law, the associative laws, and commutativity with- out reference. Other than that you need to explain in each step which property of the ordered field you are using. [4]

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