Question

Phân tích đa thức thành nhân tử:

x² + 4x + 3

Answer 1

x² + 4x + 3

= x² + x + 3x + 3

= x(x + 1) + 3(x + 1)

= (x + 1)(x + 3)

Answer 2

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

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

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

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

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

Answer 3

Answer 4

x^2+4x+3

=x^2+x+3x+3

=x(x+1)+3(x+1)

=(x+3)(x+1)

vậy ...