x² - 14x + 5 = 0
x₁ + x₂ = 14
x₁ * x₂ = 5
x₁² + x₂² = (x₁ + x₂)² - 2x₁ * x₂ = 14² - 2 * 5 = 196 - 10 = 186
x₁² + x₂² = 186
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Verified answer
x² - 14x + 5 = 0
x₁ + x₂ = 14
x₁ * x₂ = 5
x₁² + x₂² = (x₁ + x₂)² - 2x₁ * x₂ = 14² - 2 * 5 = 196 - 10 = 186
x₁² + x₂² = 186