Respostas

2013-07-10T18:53:51-03:00
(2x-3)²-4(x-1)(x+1)+5
(2x-3)(2x-3)-4(x-1)(x+1)+5
4x²-6x-6x+9-4(x²-1)+5
4x²-12x+9-4x²+4+5
-12x+18
2 5 2