Question

×(2×-1)+6=4 (×+1) como resolver

Answer 1

x.(2x - 1) + 6 = 4.(x + 1)
2x² - x + 6 = 4x + 4
2x² - x - 4x + 6 - 4 = 0
2x² - 5x + 2 = 0
a = 2; b = - 5; c = 2

Δ = b² - 4ac
Δ = (-5)² - 4.2.2
Δ= 25 - 8.2
Δ = 25 - 16
Δ = 9

a = 2; b = - 5; c = 2

x = - b +/- √Δ      =  - (-5) +/- √9
     ----------------       ----------------
            2a                    2.2

x = 5 + 3
     --------  = 8/4 = 2
         4

x = 5 - 3        2 (:2)          1
     -------  = ------       =  ------
         4           4 (:2)         2

R.: x = 2 e x = 1/2