若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()

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若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()若4x/x²-

若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()
若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()

若4x/x²-4=[a/(x+2)]-[b/(x-2)],则a-2b的值是()
答案是
6