Respuesta :
area of square = (side)^2
so 9x2 - 24x + 16
= (3x)^2 - 2*(4)*(3x) + 4^2
= (3x - 4)^2
so side = 3x - 4
so 9x2 - 24x + 16
= (3x)^2 - 2*(4)*(3x) + 4^2
= (3x - 4)^2
so side = 3x - 4