Adding and subtracting radical expressions works like adding and subtracting expressions involving variables. Just as we need
like terms when combining expressions involving variables we need
like radicals in order to combine radical expressions.
4x + 3x = 7x
5x + 4y = 5x + 4y
Have like terms
Step 1 : simplify each term
Step 2 : combine like terms
Home work : Ex # 34 ( omit # 10 , 16 , 18 )