Question

x² + 2x - 8 = 0
Calcule a equação de 2° grau.​

Answer 1

Resposta:

x² + 2x - 8 = 0

Bhaskara

a: 1

b: +2

c: -8

Δ= $b^{2}$ - 4.a.c

Δ= $2^{2}$ - 4.1.(-8)

Δ= 4 + 32

Δ= 36

x= -b ± √Δ / 2.a

x= - 2 ± √36 / 2.1

x= -2 ± 6 / 2

• $x_{1}$= -2+6 / 2 = $\frac{4}{2}$ = $\frac{2}{1}$
• $x_{2$= -2-6 / 2 = $\frac{-8}{2}$ = $\frac{-4}{1}$