Question

2x ao quadrado menos 2X menos 12 igual zero fórmula de bháskara

Answer 1

2x²-2x-12=0

Δ=b²-4ac

Δ=(-2)²-4.2.(-12)

Δ=4+96

Δ=100

x'=-b+√Δ/2a

x'=-(-2)+√100/2.2

x'=2+10/4

x'=12/4

x'=3

x"=-b-√Δ/2a

x"=-(-2)-√100/2.2

x"=2-10/4

x"=-8/4

x"=-2

Bons estudos!

Answer 2

Resposta:

3 e -2

Explicação passo-a-passo:

2x²-2x-12=0

x= -(-2)±√2²-4.2.(-12)/2.2

x= 2 ± √4 + 96/4

x = 2 ± √100/4

x = 2 ±10/4

x'=2+10/4 ⇒ x'= 12/4⇒ x'=3

x''= 2-10/4 ⇒ x''= -8/4⇒ x''= -2