Question

Y=x^2-2x+8 what is the symmetry

Answer 1

A graph shows the line of symmetry is x=1.


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For y = ax² +bx +c, the line of symmetry is x = -b/(2a). You have a=1, b=-2, so this formula gives the line of symmetry as
  x = -(-2)/(2(1)) = 2/2
  x = 1