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Posted by on Friday, January 9, 2009 at 7:55pm.

Simplify: -5^3 -3

-125 -3 = 122 correct?

  • Math 115 24 - , Friday, January 9, 2009 at 8:00pm

    No, on two counts
    -125 + 3 = -122
    -125 - 3 = -128

  • Math 115 24 - , Friday, January 9, 2009 at 8:02pm

    -5 * -5 = 25
    25 * -5 = -125

    -125 -3 = -128

  • Math 115 24 - , Friday, January 9, 2009 at 8:02pm

    Look at what you are doing on a number line, negative is left. More negative is more left.

  • Math 115 24 - , Friday, January 9, 2009 at 8:05pm

    Oh, I bet I know what caused the confusion:
    If you multiply or divide two negative numbers you change the sign to positive.
    HOWEVER
    That does not happen when adding.

  • Math 115 24 - , Saturday, January 10, 2009 at 10:36am

    i think -125-3=-128

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