Question

(3x + 1) ² resultado

Answer 1

Resolução

(3x + 1)²
(3x + 1).(3x + 1)
3x.(3x + 1) + 1.(3x + 1)
9x² + 3x + 3x + 1
9x² + 6x + 1

Answer 2

(3x + 1)²

(3x + 1)(3x + 1)

9x² + 6x + 1 = 0

a = 9, b = 6, c = 1


Δ = b² - 4 . a . c
Δ = 6² - 4 . 9 . 1
Δ = 36 - 36
Δ = 0

x = (- b ± √Δ) /2.a                             x = (-6±√0)/18


x = -6/18 = -1/3


Forte abraço!