Respostas

2014-05-28T16:35:35-03:00
(x-6)(x-6) = (x-2)(x-6)-10x 
x^2-6x-6x+36 = x^2-6x-2x+12-10x 
x^2-12x+36 = x^2-18x+12 
x^2-x^2-12x+36= -18x +12 
-12x+18x = 12-36 
6x = -24 
x = -24/6 
x= -4