X^2-6X+9/X^2-X-6除以X^2-9/X^2-3X-10乘以X+3/2X-10

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X^2-6X+9/X^2-X-6除以X^2-9/X^2-3X-10乘以X+3/2X-10
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X^2-6X+9/X^2-X-6除以X^2-9/X^2-3X-10乘以X+3/2X-10
X^2-6X+9/X^2-X-6除以X^2-9/X^2-3X-10乘以X+3/2X-10

X^2-6X+9/X^2-X-6除以X^2-9/X^2-3X-10乘以X+3/2X-10
={(x-3)/[(x+2)(x-3)]}*{(x+2)(x-5)/[(x-3)(x+3)]*(x+3)/[2(x-5)] =1/2