完全平方公式专项练习
知识点：
完全平方公式：
(a+b)
<Object: word/embeddings/oleObject1.bin>
=a<Object: word/embeddings/oleObject2.bin>
+2ab+b
<Object: word/embeddings/oleObject3.bin>
(a-b)
<Object: word/embeddings/oleObject4.bin>
=a<Object: word/embeddings/oleObject5.bin>
-2ab+b
<Object: word/embeddings/oleObject6.bin>
两数和（或差）的平方，等于它们的平方和，加上（或减去）它们的积的2倍。
1、完全平方公式也可以逆用，即
a<Object: word/embeddings/oleObject7.bin>
+2ab+b
<Object: word/embeddings/oleObject8.bin>
=(a+b)
<Object: word/embeddings/oleObject9.bin>
a<Object:  ...