In week 4 we have learned 2.3 adding and subtracting Radical Expressions and Multiplying and Dividing Radical Expressions. Adding and subtracting radical expressions sound hard but they are easy. Step 1: Simplify each radical. Step 2: add or subtract the same number inside the Root symbol(√), for example, 4√a, 3√a. This two example the number inside the Root is same so if they add together will be 7√a, if they subtracting will be √a. Multiplying Radical Expressions, step 1: Multiplying the number with another number. Step 2: simplify if possible. For example, √6(√6-√2) = √36- 2√6 = 6 – 2√6.