What is the following difference? 11 square root of 45 minus 4 square root of 5

Simplify the radical first: √45 = √(9 × 5) = 3√5. Then 11√45 − 4√5 = 11(3√5) − 4√5 = 33√5 − 4√5 = 29√5, so the answer is 29 square root of 5.

AI-written and checked against the verified answer.