Answer:
-72x is missing in Kylie's work
Step-by-step explanation:
Kylie explained that [tex](-4x + 9)^2[/tex] will result in a difference of squares because [tex](-4x + 9)^2 = (-4x)^2 + (9)^2 = 16x^2 + 81[/tex]
LEts expand [tex](-4x + 9)^2[/tex] and check
[tex](-4x + 9)(-4x+9)[/tex]
Apply FOIL method to multiply it
[tex]16x^2-36x -36x+81[/tex]
Combine like terms
[tex]16x^2-72x+81[/tex]
The final expression will not result in difference of squares
Because we are multiplying the same terms
-72x is missing in Kylie's work
