x² - 6x + 14(x-3)² = 81
x² - 6x + 14(x²- 6x + 9) = 81
x² - 6x + 14x² - 84x + 126 = 81
15x² - 90x + 45 = 0
x² - 6x + 3 = 0
D = 6² - 12 = 24
√D = 2√6
x₁ = (6 + 2√6):2 = 3 + √6
x₂ = (6 - 2√6):2 = 3 - √6
где ответ Дˆ)つ (づ ●─● )づ (つ≧▽≦)つ (づ ●─● )づ (つ≧▽≦)つ (⊃。•́‿•̀。)⊃ ┐( ˘_˘)┌ ┐( ˘_˘)┌ ┐( ˘_˘)┌
Объяснение:
┐( ˘_˘)┌ ┐( ˘_˘)┌ ┐( ˘_˘)┌ ┐( ˘_˘)┌ ┐( ˘_˘)┌ ┗(^0^)┓ ┗(^0^)┓ ┗(^0^)┓ ┗(^0^)┓ ψ(`∇´)ψ ψ(`∇´)ψ ψ(`∇´)ψ ψ(`∇´)ψ (¦3[▓▓] (¦3[▓▓] (¦3[▓▓] (¦3[▓▓] (¦3[▓▓] ( ‾́ ◡ ‾́ ) ⟵(๑¯◡¯๑) {[(-_-)(-_-)]} {[(-_-)(-_-)]} o(〃^▽^〃)o (⁄ ⁄•⁄ω⁄•⁄ ⁄) (╭☞•́⍛•̀)╭☞ (╯°口°)╯︵ ┻━┻ (ノT_T)ノ ^┻━┻ ♪ \\(^ω^\\ ) (ノ≧∇≦)ノ ミ ┻━┻ (┛◉Д◉)┛彡┻━┻ (ノ◕ヮ◕)ノ*.✧ ᕙ(@°▽°@)ᕗ ᕙ( ͡◉ ͜ ʖ ͡◉)ᕗ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ (┛◉Д◉)┛彡┻━┻ ᕙ( ͡◉ ͜ ʖ ͡◉)ᕗ
(x^2-6x)+14(x-3)^2=81,
x^2-6x+14x^2-84x+126=81,
15x^2-90x+45=0,
x^2-6x+3=0,
D=24,
x1=3-√6,
x2=3+√6.