Seudónimo Seudónimo
  • 16-04-2018
  • Mathematics
contestada

Which equation represents the axis of symmetry of the function y=-2x^2+4x-6.
a. y= 1
b. x= 1
c. x= 3
d. x= -3

Respuesta :

riyanandola
riyanandola riyanandola
  • 16-04-2018
your  answer is x = 3
Answer Link
sqdancefan
sqdancefan sqdancefan
  • 16-04-2018
For a quadratic of the form
  ax² +bx +c
the axis of symmetry is
  x = -b/(2a)

You have
  a = -2, b = 4
so
  x = -b/(2a) = -4/(-2*2)
  x = 1

The appropriate choice is
  b. x= 1
Answer Link

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