Question

2 elevado a 2 - 10 X -12 igual 0

Answer 1

2x² - 10x - 12 = 0 (:2)
x² - 5x - 6 = 0

a = 1; b = - 5; c = - 6

Δ = b² - 4ac
Δ = (-5)² - 4.1.(-6)
Δ = 25 + 24
Δ = 49

x = - b +/- √Δ = - ( - 5) +/- √49
           2a                  2.1

x = 5 + 7 = 12/2 = 6
        2

x = 5 - 7 = - 2/2 = - 1
        2

R.: x = 6 e x = - 1