tanyaballas tanyaballas
  • 06-02-2017
  • Mathematics
contestada

X^2 -2x -1 = 0

Pls help...show work and the answer

Respuesta :

LammettHash
LammettHash LammettHash
  • 06-02-2017
[tex]x^2-2x-1=x^2-2x+1-2=(x-1)^2-2=0[/tex]

Solve for [tex]x[/tex]:

[tex](x-1)^2-2=0[/tex]
[tex](x-1)^2=2[/tex]
[tex]x-1=\pm\sqrt2[/tex]
[tex]x=1\pm\sqrt2[/tex]
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