Question

Квадратное уравнение

Answer 1

2x² + x√5 – 15 = 0

D = (√5)² + 4·2·15 = 125 = (5√5)²

x₁ = (–√5 – 5√5) / 4 = –3√5 / 2

x₂ = (–√5 + 5√5) / 4 = √5