Question

(x-3). (x-3) responda

Answer 1

x² -3x -3x +9 = 0
x² - 6x +9 = 0 

Δ = -6² - 4*9      Δ = 36 - 36       Δ = 0

x = 6+-√0 / 2
x= 6/2
x' = 3
x'' = 3