Respostas

2014-08-11T20:04:42-03:00
Olá, Sterbliche!

(x+12) . (x-12)
x² - 12x + 12x - 144
x² - 144

Se quiser continuar a resolver:

x² - 144
x² = 144
x = √144
x = 12
1 5 1
2014-08-11T20:08:00-03:00
(x+12).(x-12)=
x²-12x+12x+144=
x²+144