Week 3 Absolute Value and Radicals


The absolute value of a real number is defined as the principal square root(√25) of the square of a number.

EX:|9|=3 ,|-9|=3



Simplifying Radical Expressions


Square roots :ex ²√16=4

Roots(-other roots)[

Cube roots :ex³√27=3

Warn:²√x     (x≥0)restriction

³√x     (x∈R)restriction



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