Question

1, phân tích đa thức thành nhân tử.

a, a^3 - 2a^2 + a

b, 3u^3 - 7u +2

Answer 1

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

Answer 2

Câu a :

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

Câu b :

\(3u^2-7u+2\)

\(=3u^2-6u-u+2\)

\(=3u\left(u-2\right)-\left(u-2\right)\)

\(=\left(u-2\right)\left(3u-1\right)\)