x² + bx + 4 = 0
x₁ = 4
По теореме Виета :
x₁ * x₂ = 4
4 * x₂ = 4
x₂ = 1
x₁ + x₂ = - b
4 + 1 = - b
b = - 5
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Verified answer
x² + bx + 4 = 0
x₁ = 4
По теореме Виета :
x₁ * x₂ = 4
4 * x₂ = 4
x₂ = 1
x₁ + x₂ = - b
4 + 1 = - b
b = - 5