1) x²-3x-5-√7=0
D = 9 + 20 + 4√7 = 29 + 4√7; √D = √(29 + 4√7)
x₁ = (3 + √(29 + 4√7))/2; x₂ = (3 - √(29 + 4√7))/2.
Ответ: (3 + √(29 + 4√7))/2; (3 - √(29 + 4√7))/2.
2) x²+4x-√3 +1=0
D = 16 + 4√3 - 4 = 12 + 4√3; √D = √(12 + 4√3) = 2√(3 + √3).
x₁ = (-4 + 2√(3 + √3))/2 = -2 + √(3 + √3); x₂ = -2 - √(3 + √3).
Ответ: -2 + √(3 + √3); -2 - √(3 + √3).
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1) x²-3x-5-√7=0
D = 9 + 20 + 4√7 = 29 + 4√7; √D = √(29 + 4√7)
x₁ = (3 + √(29 + 4√7))/2; x₂ = (3 - √(29 + 4√7))/2.
Ответ: (3 + √(29 + 4√7))/2; (3 - √(29 + 4√7))/2.
2) x²+4x-√3 +1=0
D = 16 + 4√3 - 4 = 12 + 4√3; √D = √(12 + 4√3) = 2√(3 + √3).
x₁ = (-4 + 2√(3 + √3))/2 = -2 + √(3 + √3); x₂ = -2 - √(3 + √3).
Ответ: -2 + √(3 + √3); -2 - √(3 + √3).