Question

resolva a equação a seguir ×.(2×-1)+6=4.(×+1)

Answer 1

2x² -x +6 = 4x +4
2x² -5x +2 = 0

Δ = b² -4ac

(-5)² -4 . 2 . 2
25 - 16
9

x = (-b ± √Δ)/2a
x = (5 ± 3)/4

x' = 8/4  →  2

x'' = 2/4  → 1/2


S = {2 , 1/2}