Question

(u-5) al cuadrado - 18 igual a cero

Answer 1

(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