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-3 x -3
When you add the values 3, 5, 8, 12 and 20 and then divide by the number of values, the result is 9.6 This is called the mean, or the average. 9.5 is called "the mistake."
They are negative
Ah! but they can. Using absolute values |3-i|<|3+2i|.
A=12b+3 A=-2b--4