Question

Phân tích đa thức sau thành nhân tử :

x^3 - 5x^2 +2x +2

Answer 1

=x³-x²-4x²+4x-2x+2

=x²(x-1)-4x(x-1)-2(x-1)

=(x-1)(x²-4x-2)

Answer 2

\(x^3-5x^2+2x+2\)

\(=x^3-x^2-4x^2+4x-2x+2\)

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

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