«Øºc»P±Ð¾Ç Constructivism and Teaching
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(a+b)2 = (ab/2) 4 + c2
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(a+b) 2 = (ab/2)4+c2
a2 +2ab+b2 = 2ab+c2
a2 + b2 = c2
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3¡B¥±ª½¨¤§¤¼Ð¨t¤W¨âÂI C(1,3)¡AD(-3,6)¡A¨D [CD] = ¡S
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