Let $P(x)=x^3+3ax^2+3bx+c$ and $P(x)=0$ only for $x=\alpha$ then; $\alpha$ is also root of equation
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Let $P(x)=x^3+3ax^2+3bx+c$ and $P(x)=0$ only for $x=\alpha$ then; $\alpha$ is also root of equation