数学完全平方公式题.1、已知a+1/a=3,则a²+1/a²的值为()2、9x²+()+y²=(3x-y)²,4x²+6xy+()=(2x+())²3、如果a²+2a=1,则(a+1)²=()4、一个正方形的边长增加2,他
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![数学完全平方公式题.1、已知a+1/a=3,则a²+1/a²的值为()2、9x²+()+y²=(3x-y)²,4x²+6xy+()=(2x+())²3、如果a²+2a=1,则(a+1)²=()4、一个正方形的边长增加2,他](/uploads/image/z/1735427-11-7.jpg?t=%E6%95%B0%E5%AD%A6%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%85%AC%E5%BC%8F%E9%A2%98.1%E3%80%81%E5%B7%B2%E7%9F%A5a%2B1%2Fa%3D3%2C%E5%88%99a%26sup2%3B%2B1%2Fa%26sup2%3B%E7%9A%84%E5%80%BC%E4%B8%BA%EF%BC%88%EF%BC%892%E3%80%819x%26sup2%3B%2B%EF%BC%88%EF%BC%89%2By%26sup2%3B%3D%EF%BC%883x-y%EF%BC%89%26sup2%3B%2C4x%26sup2%3B%2B6xy%2B%EF%BC%88%EF%BC%89%3D%EF%BC%882x%2B%EF%BC%88%EF%BC%89%EF%BC%89%26sup2%3B3%E3%80%81%E5%A6%82%E6%9E%9Ca%26sup2%3B%2B2a%3D1%2C%E5%88%99%28a%2B1%29%26sup2%3B%3D%EF%BC%88%EF%BC%894%E3%80%81%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2%E7%9A%84%E8%BE%B9%E9%95%BF%E5%A2%9E%E5%8A%A02%2C%E4%BB%96)
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