Question

como se resolve x² +4x -12=0

Answer 1

Δ = b² - 4ac

Δ = 4² - 4 · 1 · (-12)

Δ = 16 + 48

Δ = 64

x = (-b ± √64) /2

x =(-4 ± 8) /2

x' = (-4 + 8) /2 → x' = 4/2 → x' = 2

x" = (-4 - 8) /2 → x" = -12/2 → x" = -6

Resposta: x' = 2 , x" = -6