Respuesta :
expand means you perform the multiplication
[tex] {x}^{2} - 3x - 3x + 9 [/tex]
then simplify by adding the x terms
[tex]{ x}^{2} - 6x + 9[/tex]
[tex] {x}^{2} - 3x - 3x + 9 [/tex]
then simplify by adding the x terms
[tex]{ x}^{2} - 6x + 9[/tex]