a: \(\Leftrightarrow x^3-3x^2+3x-1-x^3-2x^2-x=10x-5x^2-11x-22\)
\(\Leftrightarrow-5x^2+2x-1=-5x^2-x-22\)
=>3x=-21
hay x=-7
b: \(\Leftrightarrow x^3-1-2x=x^3-x\)
=>-x=-2x-1
=>x=1
c: \(\Leftrightarrow x^3-6x^2+12x-8+9x^2-1=x^3+3x^2+3x+1\)
\(\Leftrightarrow12x-9=3x+1\)
=>9x=10
hay x=10/9