Question

resolva a equação utilizando bhaskara -×2-6×-9=O

Answer 1

-×2-6×-9=O
delta = (-6)^2 - 4.(-1).(-9)
delta = 36 - 36
delta = 0

x'= - (-6) + 0 / -2
x'= 6 / -2
x' = -3

x" = -(-6)-0 / -2
x" = 6 / -2
x"= -3

Answer 2

- x² - 6x - 9 = 0 (-1)
x² + 6x + 9 = 0
a = 1; b = 6; c = 9
Δ  = b² - 4ac
Δ = 6² - 4.1.9
Δ = 36 - 36
Δ = 0

x = - b +/- √Δ    = - 6 +/- √0
      ---------------    ----------------
              2a                2.1

x = - 6/2
x = - 3

Resp.: x = - 3