如果实数x满足x3+2x-3=0,那么代数式(x2/(x+1)+2)/1/(x+1)quickly!

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如果实数x满足x3+2x-3=0,那么代数式(x2/(x+1)+2)/1/(x+1)
quickly!

(x2/(x+1)+2)/1/(x+1)=4