(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1的值

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(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1的值

(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1的值
(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1的值

(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1的值
(x-2)(x-3)分之1减(x-1)(x-3)加(x-1)(x-2)分之1
=(x-1)(x-2)(x-3)分之【x-1-x+2+x-3】
=(x-1)(x-2)(x-3)分之(x-2)
=(x-1)(x-3)分之1