Question

calcule o produto:

(x+11).(x-11)

Answer 1

(x + 11) . (x - 11)
x² - 11x + 11x - 11² = 0
x² - 121 = 0
x² = 121
x = ± √121
x = ± 11

Answer 2

(x+11).(x-11)
x² - 11x + 11x - 121


x² - 121 = 0
x² = 0 + 121
x² = 121
x = √121
x = ± 11