Q1 of 11 Page 92

Find the values.

(–5)3

Here the number is negative.


So during multiplication care has to be taken of the sign.


The basic rules are:


Negative Number × Negative Number = Positive


Negative Number × Positive Number = Negative Number


Positive Number × Positive Number = Positive Number


The cube of -5 can be written as follows:


-5 × -5 × -5


25 × -5


= -125


Hence (-5)3 = -125


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