Răspuns :
[tex] {x}^{2} - 3x + 2 = {x}^{2} - 2x - x + 2[/tex]
[tex] = x(x - 2) - 1(x - 2)[/tex]
[tex] = (x - 2)(x - 1)[/tex]
[tex] = x(x - 2) - 1(x - 2)[/tex]
[tex] = (x - 2)(x - 1)[/tex]