No. Not is x = 0 or if it an imaginary number.
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0 * 0 is not positive.
A positive number. Positive Number x Positive Number = Positive Number Positive Number x Negative Number = Negative Number Negative Number x Negative Number = Positive Number
It is a positive reciprocal. x-a = 1/xa or equivalently, (1/x)a
Yes, if x is a negative number.
The absolute value of a positive number is the same number - in this case, 1.5. The absolute value of a negative number is the number, without the sign. Note that the absolute value of an expression like (-x) is not necessarily (x); rather, you have to separately consider the case that x is positive, or that x is negative. For example, the absolute value of x is x (if x is positive), or (-x) (if x is negative).