Exponents and Absolute Value

__Exponents__ … the exponent tells how many times to use the base as a factor. The exponent is attached to the single character
(number) directly below the exponent and to the left unless a parenthesis is used and then
the exponent affects everything within the parenthesis.
Therefore, _{
}is very
different from _{
}

__Absolute
value__ … is the distance of a number from zero. The evaluation of an absolute value is always
positive. _{
} and _{
}

Understand
the difference between the evaluation of an expression like
_{
} and _{
}.

In the first expression, *absolute value* has to be evaluated first and then the
negation on the outside makes the expression negative 9.
In the second expression the evaluation is multiplying a negative 9 {on the
inside} times a negative1 {assumed by the –( } which results in positive 9.