m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2先化简,再求值.
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![m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2先化简,再求值.](/uploads/image/z/5264533-37-3.jpg?t=m%26%23178%3B-4m%2B4%2Fm%26%23178%3B-1%C3%B7m-2%2Fm%2B1%2B2%2Fm-1%2C%E5%85%B6%E4%B8%ADm%3D2%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC.)
m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2先化简,再求值.
m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2
先化简,再求值.
m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2先化简,再求值.
=(m-2)²/(m+1)(m-1)*(m+1)/m-2+2/m-1
=(m-2)/(m-1)+2/m-1
=m/m-1
=2