已知X方-5X-2000=0,求(X-2)分之【(X-2)三次方-(X-1)方+1】的值

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已知X方-5X-2000=0,求(X-2)分之【(X-2)三次方-(X-1)方+1】的值

已知X方-5X-2000=0,求(X-2)分之【(X-2)三次方-(X-1)方+1】的值
已知X方-5X-2000=0,求(X-2)分之【(X-2)三次方-(X-1)方+1】的值

已知X方-5X-2000=0,求(X-2)分之【(X-2)三次方-(X-1)方+1】的值
(X-2)分之【(X-2)三次方-(X-1)方+1】
=【(X-2)三次方-(X-1+1)(x-1-1)】/(X-2)
=【(X-2)三次方-X(x-2)】/(X-2)
=(x-2)^2-1
=x^2-4x+4-x
=x^2-5x+4
=2000-4
=1996