If x=(a+sqrt(a^2+b^3))^(1/3)+(a-sqrt(a^2+b^3))^(1/3) then prove x^3+3bx=2a

If x=(a+sqrt(a^2+b^3))^(1/3)+(a-sqrt(a^2+b^3))^(1/3) then prove x^3+3bx=2a
Class: 10
For SEE Mathematics, Algebra, Challenging question, question from radicals.

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