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

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