二次方程 Save Sign in to save words èrcìfāngchéng ㄦˋ ㄘˋ ㄈㄤ ㄔㄥˊ quadratic equation math. Character by character 二(èr)two 次(cì)next in sequence 方(fāng)surname Fang 程(chéng)surname Cheng A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0