二次方程顶点形式

GeoGebra 命令及参数

1. Text(c) → text3
2. AttachCopyToView(PolyLine[(-9.10765457925362, -1.640550848431981), (-9.10765457925362, -1.5591977568469089), (-9.10765457925362, -1.4778446652618364), (-9.087316306357351, -1.33547675498796), (-9.066978033461083, -1.2744619362991558), (-9.046639760564815, -1.2134471176103516), (-9.00596321477228, -1.1524322989215474), (-8.944948396083474, -1.1320940260252794), (-8.88393357739467, -1.0914174802327434), (-8.802580485809598, -1.0710792073364752), (-8.721227394224526, -1.0710792073364752), (-8.68055084843199, -1.1320940260252794), (-8.68055084843199, -1.2337853905066198), (-8.68055084843199, -1.33547675498796), (-8.660212575535722, -1.3964915736767642), (-8.660212575535722, -1.4981829381581047), (-8.639874302639454, -1.5795360297431769), (-8.619536029743186, -1.640550848431981), (-8.538182938158112, -1.5591977568469089), (-8.497506392365576, -1.4981829381581047), (-8.436491573676772, -1.4168298465730325), (-8.375476754987968, -1.3761533007804962), (-8.3551384820917, -1.315138482091692), 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