What are the complex roots of the equation x^2-20? Algebra Radicals and Geometry Connections Simplification of Radical Expressions 1 Answer Alan P. May 20, 2018 If you meant #x^2=-20# then then #x=+-2sqrt(5)i# Explanation: #sqrt(-20)=sqrt(20)i=sqrt(2^2 * 5)i=2sqrt(5)i# and #x^2=-20rArr x=+-sqrt(-20)# Answer link Related questions How do you simplify radical expressions? How do you simplify radical expressions with fractions? How do you simplify radical expressions with variables? What are radical expressions? How do you simplify #root{3}{-125}#? How do you write # ""^4sqrt(zw)# as a rational exponent? How do you simplify # ""^5sqrt(96)# How do you write # ""^9sqrt(y^3)# as a rational exponent? How do you simplify #sqrt(75a^12b^3c^5)#? How do you simplify #sqrt(50)-sqrt(2)#? See all questions in Simplification of Radical Expressions Impact of this question 1228 views around the world You can reuse this answer Creative Commons License