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根據百分率找數量（二）: 例2的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
兩組對邊相等的四邊形
國旗 (作圖步驟直接餵給 Claude)
拼砌四邊形
Nested spiral octagon
國旗 (Claude 版)
Discover Resources
正方變十字
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
二次函數
project euler202（反射光线路线数）
单叶双曲面-双叶双曲面
Discover Topics
Reflection
Cylinder
Subtraction
Conic Sections
Linear Programming or Linear Optimization