Respostas

2014-03-05T17:44:24-03:00
3(y²-1)²+2(2y+2)²
3.y⁴-2y²+1+2.4y²+8y+4
3y⁴-2y²+1+8y²+8y+4
3y⁴-6y²+5+8y