rockwell1919
rockwell1919 rockwell1919
  • 19-04-2020
  • Mathematics
contestada

Solve x2 + 12x + 6 = 0 using the completing-the-square method.
Ox= 6 + V30
Ox= 6+ V30
Ox= 60 V6
Ox= 6 + V6

Respuesta :

nktselepov
nktselepov nktselepov
  • 19-04-2020

[tex] {x}^{2} + 12x + 6 = 0 \\ D = {12}^{2} - 4 \times 6 = 144 - 24 = 120 = \\ = (2 \sqrt{30} )^{2} \\ x_1= \frac{ - 12 + 2 \sqrt{30} }{2} = - 6 + \sqrt{30} \\ x_2= \frac{ - 12 - 2 \sqrt{30} }{2} = - 6 - \sqrt{30} [/tex]

But i don't see correct answer here

Ox= 6 + V30

Ox= 6+ V30

Ox= 60 V6

Ox= 6 + V6

or maybe i don't understend something

Answer Link

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