Question

preciso urgente!!
$3x { }^{2} - 7x + 1 = - 1$

Answer 1

3x²-7x+1 = -1 ⇔

⇔ 3x²-7x+2 = 0 a = 3 ; b = -7 ; c = 2

x = (-b ± √(b²-4ac)) / 2a ⇔

⇔ x = (7 ± √(49-4×3×2) / 2×3 ⇔

⇔ x = (7 ± √25) / 6 ⇔

⇔ x = (7-5)/6 ∨ x = (7+5)/6 ⇔

⇔ x = 1/3 ∨ x = 2

x = { (1/3) ; 2 }