Question

f(x) = 1/3x² - 2x - 4 = 0

URGENTEEEEEEEEEEEEE

Answer 1

$\frac{1}{3}.x^2-2.x-4=0\\3.(\frac{1}{3}.x^2-2.x-4)=3.0\\x^2-6.x-12=0$

Δ = b² -4.a.c

x = -b ±√Δ / 2.a

 x² -6.x -12 = 0

a = 1, b = -6, c = -12

Δ = (-6)² -4.1.(-12)

Δ = 36 +48

Δ = 84

x = -(-6) ±√84 / 2.1

x = 6 ±2√21 /2

x' = 6 +2√21 /2

x' = 3 +√21

x = 6 -2√21 /2

x'' = 3 -√21

Dúvidas só perguntar XD