已知a≠b且a(a+2)=b(b+2),则a+b的值是
急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!...
急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!急!!!!!!!!!!!!!!!!!!!
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