Анатолий
6 год назад
Помогите решить 9x^2-4x-2 = 0 и 7X^2+18x+5 = 0
ОТВЕТЫ
Feofan
Jul 1, 2019
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
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
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