Question

-2 x² +x +3=0

me ajudem!!!​

Answer 1

Resposta:

Ola!

-2x² + x + 3 = 0

Coeficientes:

a = -2 ; b = 1 ; c = 3

Δ = b² - 4ac

Δ = (1)² - 4(-2)(3)

Δ = 1 + 24

Δ = 25

√Δ = √25 =5

x = (-b±√Δ)/2a

x = (-1±5)/(2)(-2)

x' = 4/-4 = -1

x" = -6/-4 = 3/2

S = {-1 ; 3/2}