Question

me ajuda.. nesse.....?..​

Answer 1

3x² - 7x + 2 = 0

a = 3

b = -7

c = 2

Δ = b²- 4 . a . c

Δ = (-7)² - 4 . 3 . 2

Δ = 49 - 12 . 2

Δ = 49 - 24

Δ = 25

x = -b ± √Δ /2 . a

x = -(-7) ± √25 /2 . 3

x = 7 ± 5 /6

x' = 7 - 5 /6

x' = 2/6

x' = 1/3

x" = 7 + 5 /6

x" = 12/6

x" = 2

S = { 1/3 , 2 }

Letra D