To add or subtract radicals, the degree and radicand must be the same. For example, \(2\sqrt{3} + 3\sqrt{3} = 5\sqrt{3}\) but \(2\sqrt{2} + 2\sqrt{3}\) cannot be added because they have different radicands.
What is \( 5 \)\( \sqrt{45} \) - \( 4 \)\( \sqrt{5} \)
| 20\( \sqrt{5} \) | |
| 20\( \sqrt{45} \) | |
| \( \sqrt{9} \) | |
| 11\( \sqrt{5} \) |