通分 (2-x)/(4-2x)与(2x)/(x^2-4)

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通分(2-x)/(4-2x)与(2x)/(x^2-4)通分(2-x)/(4-2x)与(2x)/(x^2-4)通分(2-x)/(4-2x)与(2x)/(x^2-4)答:(2-x)/(4-2x)=(x-2

通分 (2-x)/(4-2x)与(2x)/(x^2-4)
通分 (2-x)/(4-2x)与(2x)/(x^2-4)

通分 (2-x)/(4-2x)与(2x)/(x^2-4)
答:
(2-x)/(4-2x)
=(x-2)/(2x-4)
=(x-2)(x+2)/[2(x-2)(x+2)]
=(x^2-4)/[2(x^2-4)]
(2x)/(x^2-4)
=4x/[2(x^2-4)]