Question

X2-X-12=0 cálculo e resposta

Answer 1

x² - x - 12 = 0

a = 1    b = -1    c = -12

Delta = b² - 4ac
Delta = 1 - 4(1)(-12)
Delta = 1 + 48
Delta = 49

X = (-b +- √Δ) / 2a
X = (1 +- 7) / 2

x' = 8 / 2 = 4
x" = -6 / 2 = -3

BONS ESTUDOS!

Answer 2

x² - x - 12 = 0
a = 1; b = - 1; c = - 12

Δ = b² - 4ac
Δ = (-1)² - 4.1.(-12)
Δ = 1 - 4.(-12)
Δ = 1 + 48
Δ = 49

x = - b +/- √Δ       - (- 1) +/- √49
      ------------- =   ------------------
           2a                     2.1

x = 1 + 7
      -------  =  8/2 = 4
         2

x = 1 - 7
     --------  = - 6/2 = - 3
        2

R.: x = 4 e x = - 3