若(x+2009)²=123456789,则(x+2019)(x+1999)的值是( )若(x+2009)²=123456789,则(x+2019)(x+1999)的值是( )A.123456789 B.123456779 C.123456689 D.不能确定
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![若(x+2009)²=123456789,则(x+2019)(x+1999)的值是( )若(x+2009)²=123456789,则(x+2019)(x+1999)的值是( )A.123456789 B.123456779 C.123456689 D.不能确定](/uploads/image/z/14651325-45-5.jpg?t=%E8%8B%A5%28x%2B2009%29%26sup2%3B%3D123456789%2C%E5%88%99%28x%2B2019%29%28x%2B1999%29%E7%9A%84%E5%80%BC%E6%98%AF%28+%29%E8%8B%A5%28x%2B2009%29%26sup2%3B%3D123456789%2C%E5%88%99%28x%2B2019%29%28x%2B1999%29%E7%9A%84%E5%80%BC%E6%98%AF%28+%29A.123456789+B.123456779+C.123456689+D.%E4%B8%8D%E8%83%BD%E7%A1%AE%E5%AE%9A)
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