This week in Precalc we started unit 2. We learned about an absolute value of a real number which is how far a number is from 0 and positive numbers always equal a positive number.
Ex :
|2| = 2
|-4|= 4
We also learned how to simplify radical expressions which was a good reminder on knowing how to simplify entire and mixed radicals.
Ex :
![\sqrt[3]{24x^3y^4}](http://s0.wp.com/latex.php?latex=%5Csqrt%5B3%5D%7B24x%5E3y%5E4%7D&bg=ffffff&fg=000000&s=0 "\sqrt[3]{24x^3y^4}")
![2xy \sqrt[3]{3y}](http://s0.wp.com/latex.php?latex=2xy+%5Csqrt%5B3%5D%7B3y%7D&bg=ffffff&fg=000000&s=0 "2xy \sqrt[3]{3y}")
x and y are real numbers