If $$x^{3} + 3Â x^{2}+ 3x$$ = 7, then x is equal to
Given $$x^3+3x^2+3x=7$$
Adding 1 to both sides
$$x^3+3x^2+3x+1=7+1$$
           $$\left(x+1\right)^3=8$$
          $$\left(x+1\right)^3=2^3$$
  Therefore,  x+1 = 2
              x = 1
      Â
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