What is the square root of 15? Algebra Properties of Real Numbers Square Roots and Irrational Numbers 1 Answer Meave60 Sep 27, 2015 sqrt 15=3.872983346207 Explanation: sqrt 15 cannot be simplified further except by a calculator, in which case sqrt 15=3.872983346207 Answer link Related questions What are square roots? How do you simplify square roots that are irrational? How do you find a square root of a decimal? How do you find a square root of a fraction? How do you estimate square roots? What is the square root of 100? What is the square root of 25? What is the square root of 1? How do I know if a square root is irrational? Why are square roots irrational? See all questions in Square Roots and Irrational Numbers Impact of this question 2594 views around the world You can reuse this answer Creative Commons License