(u - 5)² - 18 = 0
u² -10u + 25 - 18 = 0
u² - 10u + 7 = 0
u₁ = 5 + 3√2 ≈ 9,243
u₂ = 5 - 3√2 ≈ 0,757
Otra forma
(u - 5)² = 18
|u - 5| = √18 = 3√2
u₁ - 5 = 3√2
u₁ = 5 + 3√2
u₂ - 5 = -3√2
u₂ = 5 - 3√2
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(u - 5)² - 18 = 0
u² -10u + 25 - 18 = 0
u² - 10u + 7 = 0
u₁ = 5 + 3√2 ≈ 9,243
u₂ = 5 - 3√2 ≈ 0,757
Otra forma
(u - 5)² - 18 = 0
(u - 5)² = 18
|u - 5| = √18 = 3√2
u₁ - 5 = 3√2
u₁ = 5 + 3√2
u₂ - 5 = -3√2
u₂ = 5 - 3√2