Question

Phân tích thành nhân tử

     x³ - 3x² - 3x + 1

Answer 1

\(x^3-3x^2-3x+1\)

\(=\left(x^3+1\right)-\left(3x^2+3x\right)\)

\(=\left(x+1\right)\left(x^2-x+1\right)-3x\left(x+1\right)\)

\(=\left(x+1\right)\left(x^2-4x+1\right)\)