Respostas

2014-07-23T01:35:10-03:00
X^4 - x^2 - 5 / 4 = x^2 + 5 / 3
MMC de 4,3 = 12
12x^4 - 3 (x^2 - 5) /12 = 4 (x^2 + 5) / 12
12x^4 - 3x^2 + 15 = 4x^2 + 20
12x^4 - 3x^2 + 15 - 4x^2 - 20 = 0
12z^4 - 7x^2 - 5 = 0