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17-10-2017
Mathematics

contestada

simplify (2/(x^2-25)) - (4/(x^2-10x+25))

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17-10-2017

(2/(x^2-25))-(4/(x^2-10x+25)
(2/((x+5)(x-5)))-(4/((x-5)(x-5)))
(2(x-5))/((x+5)(x-5)(x-5)))-(4(x+5))/((x-5)(x-5)(x+5)))
(2x-10-4x-20)/((x+5)(x-5)(x-5))
(-2x-30)/((x+5)(x-5)^2)

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