Square root of 576 is 24 because 24x24=24^2 =576. With square roots, you are asking what number multiplied BY ITSELF gives me the thing under the radical? Going further, cube roots you would ask what number multiplied by itself 3 times gives me the thing under the radical? So, the cube root of 8 is 2 since 2x2x2=2^3 = 8. You can extend this idea to any nth root.