Question

Phân tích đathức thành nhân tử:

a) x² − 9y² − x + 3y

b) 125x³ − 150x²+ 60x −8

Answer 1

a: \(x^2-9y^2-x+3y\)

\(=\left(x-3y\right)\left(x+3y\right)-\left(x-3y\right)\)

\(=\left(x-3y\right)\left(x+3y-1\right)\)

Answer 2

a) \(x^2-9y^2-x+3y=\left(x-3y\right)\left(x+3y\right)-\left(x-3y\right)\)

\(=\left(x-3y\right)\left(x+3y-1\right)\)

b) \(125x^3-150x^2+60x-8=\left(5x-2\right)^3\)