please help i will give you brainiest i beg you please help and explain

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

What is the factor form of x^2-9x+14