(x-1)^3分之2x^2-4x+2

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(x-1)^3分之2x^2-4x+2(x-1)^3分之2x^2-4x+2(x-1)^3分之2x^2-4x+2[2x^2-4x+2]/(x-1)^3=2(x^2-2x+1)/(x-1)^3=2(x-1)

(x-1)^3分之2x^2-4x+2
(x-1)^3分之2x^2-4x+2

(x-1)^3分之2x^2-4x+2
[2x^2-4x+2 ] / (x-1)^3
=2(x^2-2x+1) / (x-1)^3
=2(x-1)^2 / (x-1)^3
=2 / (x-1)