The absolute value of a number is its distance from 0
Example : The absolute value of 3 or -3 is 3 because they have same distance from 0 and absolute value of 3.
The symbol for absolute value is a bar |∣vertical bar on each side of the number.
Example : The absolute value of 25, we can write it like this : |25|=25
Simplyfying Radicals :
A radical is a number that has a fraction as its exponent.
: a mix of whole numbers and radicals
Another example :