😀8.1 複數平面及複數的極式

https://www.geogebra.org/m/kZfXbA7p

https://www.geogebra.org/m/kN3Yuyvy

https://www.geogebra.org/m/beK8pGjn

二次方程式複數根之圖式

https://www.geogebra.org/m/M3HdhuPn