6.4 Addition, Subtraction, and more multiplication

Add and Subtract To add and subtract radical terms, they must have the same indices and same radicands. For example: and are like radical terms (or like radicals) because they have the same index and same radicand

1) 2) 3) 4)

More examples 5) )3 3 y y y 6 7) 25x x-9 Answers: 5) 6) 7)

Multiply To multiply radical terms (indices have to be the same): just multiply radicands then simplify For example: 3 4 · 3 10 = = 3 40 = 3 8 ·5 = 2 3 5

1) 2) 3)

4) 5)

6) Or rewrite as Then multiply