Real Numbers?

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What two properties of real numbers can be used to show that the following equation is true for any real value of a ?

a + [a + (-a)] = a

2006-11-06 05:40:38 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

Additive inverse and additive identity:

Additive inverse: ∀a, a + (-a)=0
Additive identity: ∀a, a + 0 = a

2006-11-06 06:13:17 · answer #1 · answered by Pascal 7 · 0⤊ 0⤋

commutative and associative property

2006-11-06 13:51:03 · answer #2 · answered by raj 7 · 0⤊ 0⤋