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21.1一元二次方程

学习指南：9年级（上）数学第1课时（第1周）学习指南：21.1一元二次方程—耿方方.docx
拓展资源：9年级（上）数学第1课时（第1周）学程拓展：21.1一元二次方程—耿方方.docx
视频资源：9年级（上）数学第1课时（第1周）学习指导：21.1一元二次方程—耿方方.mp4 - 21.1一元二次方程

14 views Jul 15, 2021

第十二周数学九年级第4课时 21.2解一元二次方程（1）—直接开平方法

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