Question

8 x elevado a 4 + 7x elevado a 2 + 5 = 0

Answer 1

8x⁴ + 7x ² + 5 = 0

x² = y

8y² + 7y + 5 = 0

Δ = 7² - 4. 8.5

Δ = 49 - 160

Δ = - 111

S = ∅