DUVIDAS NESSAS QUESTOES?

anonymous

Alguem me explica como fazer esses exercicios?

(Raiz de 7)^3

(Raiz quadratica de 9)^2

9x^2 -3x =-5/36

la-console

9x² - 3x = - 5/36

9.[x² - (3/9).x] = - 5/36

x² - (3/9).x = - 5/324

x² - (1/3).x = - 5/324

x² - (1/3).x + (1/6)² = - (5/324) + (1/6)²

x² - (1/3).x + (1/6)² = - (5/324) + (1/36)

x² - (1/3).x + (1/6)² = - (5/324) + (9/324)

x² - (1/3).x + (1/6)² = 4/324

x² - (1/3).x + (1/6)² = 1/81

[x - (1/6)]² = [± (1/9)]²

x - (1/6) = ± (1/9)

x = (1/6) ± (1/9)

x = (3/18) ± (2/18)

x = (3 ± 2)/18

x₁ = (3 + 2)/18 → x₁ = 5/18

x₂ = (3 - 2)/18 → x₂ = 1/18

luan

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