x² - 11x + p = 0
x₁ = - 4
x₁ + x₂ = 11
x₂ = 11 - x₁ = 11 - (- 4) = 11 + 4 = 15
x₂ = 15
p = x₁ * x₂ = - 4 * 15 = - 60
p = - 60
x² - 11x + p = 0
x₁ = - 4
x₁ + x₂ = 11
x₂ = 11 - x₁ = 11 - (- 4) = 11 + 4 = 15
x₂ = 15
p = x₁ * x₂ = - 4 * 15 = - 60
p = - 60