Week 3 we just get into a new unit about absolute value and radicals, and we learned absolute Value of a real number and simplifying radical expressions. Also we did a test of first unit Sequences and series. The absolute value of a real number a is denoted by. a. and it is the distance from a to the origin 0 on the number line. The absolute value is always positive. Simplifying radical expressions step:  Step 1: Find the prime factorization of the number inside the radical. Step 1: Find the prime factorization of the number inside the radical.  Step 2: Determine the index of the radical. In this case, the index is two because it is a square root, which means we need two of a kind.  Step 3: Move each group of numbers or variables from inside the radical to outside the radical. In this case, the pair of 2’s and 3’s moved outside the radical.  Step 4: Simplify the expressions both inside and outside the radical by multiplying.