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    syed4all's Avatar
    syed4all Posts: 7, Reputation: 1
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    Jun 21, 2017, 11:54 AM
    Question about Proof of Real Number..
    Q: For real numbers a,b show the following by stating the properties used:

    I) (-a)b = a(-b) = -ab

    ii) (-a)(-b) = ab
    smoothy's Avatar
    smoothy Posts: 25,495, Reputation: 2853
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    Jun 21, 2017, 01:15 PM
    This is YOUR homework... show us what YOU think the answer is and why. Site rules require it.
    Rebecca131's Avatar
    Rebecca131 Posts: 3, Reputation: 1
    New Member

    Jun 21, 2017, 01:39 PM
    These are pretty tricky.

    I) (-a)b = a(-b) = -ab

    Attachment 48806

    ii) (-a)(-b) = ab

    Attachment 48807

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