What is the sign of the product #(-12)(12) (-6.3) (-0.2)(-15.9)#?

1 Answer
MeneerNask
Apr 18, 2016

Minus times minus equals plus.

Explanation:

So if there is an even number of #-#signs, they cancel out two by two. And this is the case here.
If the total number of #-#signs were odd, one lonely #-#sign would be left, and the result would be negative.

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