(10/x^+3x-4)-(x+1/x-1)+1如题 ..
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(10/x^+3x-4)-(x+1/x-1)+1如题..(10/x^+3x-4)-(x+1/x-1)+1如题..(10/x^+3x-4)-(x+1/x-1)+1如题..=10/(x+4)(x-1)-(
(10/x^+3x-4)-(x+1/x-1)+1如题 ..
(10/x^+3x-4)-(x+1/x-1)+1
如题 ..
(10/x^+3x-4)-(x+1/x-1)+1如题 ..
=10/(x+4)(x-1)-(x+1)(x+4)/(x+4)(x-1)+(x+4)(x-1)/(x+4)(x-1)
=(10-x^2-5x-4+x^2+3x-4)/(x+4)(x-1)
=(-2x+2)/(x+4)(x-1)
=-2(x-1)/(x+4)(x-1)
=-2/(x+4)
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