This week in Precalculus 11, we started the Absolute Value and Radicals unit. We first learned about the absolute value of a real number.
Absolute value of a real number: its distance from zero on a number line/the principal square root of its square
Principal square root: the positive (+) square root
Example: = ±1 +1 = principal square root -1 = negative (-) square root
The symbols “||” represent absolute value.
Example: <-0-1-2-3-4-5-> |0| = 0
This is a new concept I had not yet learned about and can add to my knowledge of Pre-Calculus.