Question

3x²- 7x+ 2= 0
equaçao do 2 grau

Answer 1

Δ = b² - 4.a.c
Δ = (-7)² - 4.3.2
Δ = 49 - 24
Δ = 25

X = -b +-√Δ
------------------
            2a

X = 7 +- 5
---------------
       6

X1 = 7+5
--------------- = 2
           6

X2 = 7-5
---------------- = 2/6 ou 1/3
          6

Answer 2

$\frac{-b \frac{+}{-} \sqrt{ b^{2}-4ac } }{2a}$
b=-7
a=3
c=2
$\frac{7 \frac{+}{-} \sqrt{ 7^{2}-4.2.3 } }{2.3}$
$\frac{7 \frac{+}{-} 5}{6}$
x'=1/3
x''=2