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x² = 19x - 88
x² - 19x + 88 = 0---pro fórmula general
x₁ = - (- 19) + √((19)² - 4 * 88)/2
x₁ = 19 + √361 - 352)/2
x₁ = 19 + √(9)/2
x₁ = (19 + 3)/2
x₁ = 22/2
x₁ = 11
x₂ = (19 - 3)/2
x₂ = 16/2
x₂ =8
Solución :
x₁ = 11
x₂ = 8