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(3-x)/(2x-4)/(x+2-5/x-2)
=(3-x)/2(x-2)÷(x²-4-5)/(x-2)
=(3-x)/2(x²-9)
=(3-x)/2(x-3)(x+3)
=-1/(2x+6)
(x²+6x+9)/(x²-x-6)/(x²-9)/(x²-3x-10)*(x-3)/(x-5)
=[(x+3)²/(x-3)(x+2)]/(x-3)(x+3)/(x-5)(x+2)*(x-3)/(x-5)
=(x+3)/(x-3)
=(3-x)/2(x-2)÷(x²-4-5)/(x-2)
=(3-x)/2(x²-9)
=(3-x)/2(x-3)(x+3)
=-1/(2x+6)
(x²+6x+9)/(x²-x-6)/(x²-9)/(x²-3x-10)*(x-3)/(x-5)
=[(x+3)²/(x-3)(x+2)]/(x-3)(x+3)/(x-5)(x+2)*(x-3)/(x-5)
=(x+3)/(x-3)
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