Question

$- 2 {x}^{2} + x + 3 = 0$

Answer 1

a=-2
b=1
c=3

Δ= 1² - 4 . (-2) . 3
Δ= 1 + 24
Δ= 25

x= -1 ± 5 / (-4)
x'= -4 / (-4) = 1
x"= -6 / (-4) (÷2) = 3/2

S={ 1 e 3/2 }