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國八：乘法公式與多項式-乘開後比對左右係數
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賴尚欣
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩位數除以一位數（一）
三位數除以一位數（二）
兩組對邊相等的四邊形
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Definite Integral
Special Points
Rotation
Trigonometric Functions
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