Respostas

2013-10-17T12:43:21-03:00
36x^4 + 36 - 97x² = 0
y = x²
36y² - 97y + 36 = 0
Δ² = 97² - 4*36*36 = 9409 - 5184 = 4225
Δ = 65
y = 97/72 + 65/72 = 162/72 = 81/36
x = 9/6 = 3/2
1/x = 2/3