When multiplying integers with the same value (+or-) (-2)x(-2) the product will always be positive.
When the value of the integers of (+,-) (+2) x(-3) The product is always negative
Sign rules cont'd
(+4)x(-2)x(-1)=
8 x (-1)=+8
When you have even amount of (-) signs the product is Positive
When there are an odd number of (-) signs the product is negative
http://www.mathgoodies.com/lessons/vol5/multiplication.html
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