Prove that if a, b e R, then (a) -(a+b) = (-a) + (-b), (b) (-a)·(-b) = a · b,

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The Algebraic And Order Properties of Real Number

Please answer number 2a and 2b

Prove that if a,b e R, then
(a) -(a+b) = (-a) + (-b),
(b) (-a) · (-b) = a · b,
Transcribed Image Text:Prove that if a,b e R, then (a) -(a+b) = (-a) + (-b), (b) (-a) · (-b) = a · b,
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