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最佳答案:import java.util.*;public class Hello {private static Scanner san = new Scanner(
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最佳答案:x是一元二次方程x^2+3x-1=0的实数根,则x²+3x-1=0x²+3x=1于是[(X-3)/(3X²-6X)]/[(X+2)-5/(X-2)]=[(X-3