化简[a+2/a(a-2)]-[ 8/(a+2)(a-2)]的每一步

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化简[a+2/a(a-2)]-[8/(a+2)(a-2)]的每一步化简[a+2/a(a-2)]-[8/(a+2)(a-2)]的每一步化简[a+2/a(a-2)]-[8/(a+2)(a-2)]的每一步[

化简[a+2/a(a-2)]-[ 8/(a+2)(a-2)]的每一步
化简[a+2/a(a-2)]-[ 8/(a+2)(a-2)]的每一步

化简[a+2/a(a-2)]-[ 8/(a+2)(a-2)]的每一步
[a+2/a(a-2)]-[ 8/(a+2)(a-2)]
=(a+2)(a+2)/a(a-2)(a+2)-8a/a(a-2)(a+2)
=[(a²+4a+4)-8a]/a(a-2)(a+2)
=(a²-4a+4)/a(a-2)(a+2)
=(a-2)²/a(a-2)(a+2)
=(a-2)/a(a+2)