Question

resolver a equacao biquadrada (x²-3)²=(x+1)(x-1)

Answer 1

(x+1)(x-1) = x⁴ - 6x² + 9
x² + 1 = x⁴ - 6x² + 9
x⁴ - 6x² - x² +9 - 1 = 0
x⁴ - 7x² + 8 = 0

Y = x²

y² - 7y + 8 = 0
∆ = (-7)² - 4(1)(8)
∆ = 49 - 32 = 17