Question

phân tích thành nhân tử

x³+5x²+6x

Answer 1

\(x^3+5x^2+6x=x\left(x^2+5x+6\right)\)

\(=x\left(x^2+2x+3x+6\right)\)

=x[x(x+2)+3(x+2)]=x(x+3)(x+2)

Answer 2

\(x^3+5x^2+6x\)

= \(x^3+2x^2+3x^2+6x\)

= \(\left(x^3+2x^2\right)+\left(3x^2+6x\right)\)

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

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