Factoring Integers: Problem 4 

Rule 9: 
To factor an integer, simply break the integer down into a group
of numbers whose product equals the original number.  Factors are separated by multiplication signs.  Note that the number 1 is the factor of every number.  All factors of a number can be divided evenly into that number.

Problem 4: Factor -3 completely.
Answer. We have
 
 

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Tue Sep 3 23:11:59 MDT 1996