计算.(1)(x的三次方+x²+x+1)/(x+1) (2)(ab²-a²b)/(a-b)

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计算.(1)(x的三次方+x²+x+1)/(x+1)(2)(ab²-a²b)/(a-b)计算.(1)(x的三次方+x²+x+1)/(x+1)(2)(ab

计算.(1)(x的三次方+x²+x+1)/(x+1) (2)(ab²-a²b)/(a-b)
计算.(1)(x的三次方+x²+x+1)/(x+1) (2)(ab²-a²b)/(a-b)

计算.(1)(x的三次方+x²+x+1)/(x+1) (2)(ab²-a²b)/(a-b)
(1)(x的三次方+x²+x+1)/(x+1)
=[﹙x³+x²﹚+(x+1)]/(x+1)
= [x²﹙x+1﹚+﹙x+1﹚]/﹙x+1﹚
=﹙x+1﹚﹙x²+1﹚/﹙x+1﹚
=x²+1
(2)(ab²-a²b)/(a-b)
=ab﹙b-a﹚/﹙a-b﹚
=-ab