Question

fx=3x²-4x-4 nao estou conseguindo chegar na resposta as alternativas que tenhosao

(-2-4/6)
(-2,4/6)
(2,4/6)
(2,-4/6)

Answer 1

delta = (-4)² - 4.3.(-4)
delta = 16+48
delta = 64
x = (-(-4+/-\/64)/2.3
x = (4+/-8)/6
x1 = (4+8)/6 = 12/6 = 2
x2 = (4-8)/6 = -4/6 = -2/3
S: (2; -2/3)

Answer 2

F(x)=0
$3x^{2} -4x-4=0$
Δ=$(-4)^{2}-4.3.(-4)=16+48=64$
$x= \frac{-(-4)+- \sqrt{64} }{2.3}= \frac{4+-8}{6}=\ \textgreater \ x_{1}= \frac{4+8}{6}= \frac{12}{6}=2;x_{2}= \frac{4-8}{6}= \frac{-4}{6}$

S=(2,-4/6)

ùltima alternativa