(-1) is the same as the number -1
absolute value of -1 = l -1 l
                             = distance between -1 and 0 on the number line                                     
                             = 1
So, (-1) ≠ l -1 l 
Leah H.
asked  09/02/15 
Dave H. answered  09/02/15
High School and College Chemistry, Math, ESL instructor
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