化简,x²+4x /(2x-4)(x+4)-x+2/x² -4
3个回答
原式=x(x+4)/2(x-2)(x+4)-(x+2)/(x+2)(x-2)
=x/2(x-2)-1/(x-2)
=(x-2)/2(x-2)
=1/2
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