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If `x=2+2^(2/3)+2^(1/3)`, then the value of `x^3-6x^2+6x` is: |
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Answer» `x-2=2^(2/3)+2^(1/3)` `(x-2)^3=(2^(2/3)+2^(1/3))^3` `x^3-8-6x^2+12x=4+2+6(2^(2/3)+2^(1/3))` `x^3-6x^2+!2x-8=6+6(x-2)=6+6x-12` `x^3-6x^2+6x-8=-6` `x^3-6x^2+6x=2`. |
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