当x^2+x=1时,求2x(x^2-2x-1/3)+4(x^2+1/12x)-1/3x(3x^2-6x-1)的值
1个回答
2x(x^2-2x-1/3)+4(x^2+1/12x)-1/3x(3x^2-6x-1)=x^3+2x^2
=(x^2+x)x+x^2
=x+x^2
=1
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