Asked Feb 23, 2019

Why is the product of two negative numbers always  a positive number?


Expert Answer

Step 1

To justify the given statement about the product of negative numbers

Step 2

Negative numbers are defined (created) so that equations lime x+5=0 have solutions .(there is no solution if we restrict x to 0,1,2,3..). Having created them, we need to define the operations (addition, multiplication etc) which are consistent with the rules for positive integes.

Step 3

This consideration forces us ...


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