Tartaglia, after much persuasion, agreed to tell Cardan his method, if Cardan would swear never to reveal it and furthermore, to only ever write it down in code so that on his death, nobody would discover the secret from his papers.
Tartaglia, matapos marami amuki, sumang-ayon sa sabihin kardan kanyang paraan, kung kardan sumumpa ay hindi kailanman ihiyaw na ito at saka, sa lamang pa itong isulat sa code na ito sa kanyang kamatayan, walang tao na matuklasan ang mga lihim na mula sa kanyang mga papeles.