\(x^3+3x^2+3x+2+\sqrt[3]{x^3-8x-8}=0\Leftrightarrow x^3+3x^2+3x+2+x-\sqrt[3]{8x}-2=0\)\(\Leftrightarrow x^3+3x^2+4x-2\sqrt[3]{x}=0\Leftrightarrow\left(x^3+2x^2\right)+\left(x^2+2x\right)+2x-2\sqrt[3]{x}\)\(\Leftrightarrow x^2\left(x+2\right)+x\left(x+2\right)+2\left(x-\sqrt[3]{x}\right)\Leftrightarrow x\left(x+1\right)\left(x+2\right)+2\left(x-\sqrt[3]{x}\right)\)\(\Rightarrow|^{x\left(x+1\right)\left(x+2\right)=0\Rightarrow x=0;x+1=0\Leftrightarrow x=-1;x+2=0\Leftrightarrow x=-2}_{2\left(x-\sqrt[3]{x}\right)=0\Leftrightarrow x-\sqrt[3]{x}=0\Leftrightarrow x^3-x=0\Leftrightarrow x\left(x^2-1\right)=0\Leftrightarrow|^{x=0}_{x^2-1=0\Leftrightarrow x=\pm1}}\)
Vậy tập nghiệm của PT là S={0;-1;-2}
