问题
解答题
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答案
原式=
-2 (m+2)(m-2) 1 2(m-2)
=4-(m+2) 2(m+2)(m-2)
=-(m-2) 2(m+2)(m-2)
=-
．1 2m+4
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原式=
-2 (m+2)(m-2) 1 2(m-2)
=4-(m+2) 2(m+2)(m-2)
=-(m-2) 2(m+2)(m-2)
=-
．1 2m+4