This is a free lesson from our course in Algebra I This lesson explains how to find the absolute value of a function. It has several examples that will help you understand the concept of absolute value of functions. the absolute value of x, denoted "| x |" (and which is read as "the absolute value of x"), is the distance of x from zero. This is why absolute value is never negative; absolute value only asks "how far?", not "in which direction?". This means not only that | 3 | = 3, because 3 is three units to the right of zero, but also that | �3 | = 3, because �3 is three units to the left of zero. Overall, the mathematical formula for absolute value is:                |x| = x, if x >= 0                |x| = -x, if x < 0
Other useful lessons:
 Identify additive Inverse Identify multiplicative inverse Splitting an absolute value equation into an two separate equations
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