X^+3X-1=0即x^+3x=1[(X-3)/(3X^-6X)]/[(X+2)-5/(X-2)]=[(X-3)/(3X^-6X)]/[(x�0�5-4)/(x-2)-5/(x-2)] 先将后面两项通分=[(X-3)/(3X^-6X)]/[(x�0�5-4-5)/(x-2)]算出后面的减法,=[(X-3)/(3X(x-2)]*[x-2)/(x+3)(x-3)]=1/3x�0�5+9x=1/[3(x^+3x)]=1/3
答案是1.