Cube root this required the construction, now known to be impossible, of the length . A method for extracting cube roots appears in "The Nine Chapters on the Mathematical Art", a Chinese mathematical text compiled around the 2nd century BCE and commented on by Liu Hui in the 3rd century CE. The Greek mathematician Hero of Alexandria devised a method for calculating cube roots in the 1st century CE. His formula is again mentioned by Eutokios in a commentary on Archimedes. In 499 CE Aryabhata, a mathematician-astronomer from the classical age of Indian mathematics and Indian astronomy, gave a method for finding
The Root chorus "feeds back into itself over and over again, turning from a hook into a mantra into a gospel affirmation". In the promotional EPK for "Voodoo", D'Angelo discussed the therapeutic nature of recording "The Root", stating "It was kinda therapeutic for me to do this song. It kinda help me get over, because I'm so pathetic in the song. You know what I mean? That's what 'The Root' is. She got it on me. And I'm just fucked up. It was good for me to get over that. It was hard for me sometimes to do that song. To record