Question

Помогите решить 9x^2-4x-2=0 и 7X^2+18x+5=0

Answer 1

1)
D = 16 + 72 = 88 = (2√22)²
x₁ = (4-2√22)/18 = (2-√22)/9
x₂ = (4+2√22)/18 = (2+√22)/9

2)
D = 324 - 140 = 184 = (2√46)²
x₁ = (-18-2√46)/14 = (-9-√46)/7
x₂ = (-18+2√46)/14 = (-9+√46)/7