Question 204837
With  deference  to  my  esteemed  college..perhaps  we  should  try
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f(x) = -2x^3 -2x =-49,,,when  x=?
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or -2x^3 -2x +49 =0,,,,solve  for  x.
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In  general  this  is  a  negative  cubic  function.
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On  the  x-y  coordinate  system,  this  drops  from top  left  to  bottom right,  with  2 (3-1) turns,  and  normally 3 answers.
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Normally  we  would  factor the  function,  to  find  the  zero's.
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However  after  much  work,  we  plotted  the  function  and  found that  two  of  the  zeros  are  imaginary.  The  function  does  drop  and  does  turn  twice,  but  it  only crosses  the  x  axis once,  hence  2  imaginary Zeros (3-1=2)
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The  x  intercept  is  at  about (2.789, 0)
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checking: substitute  in original  function
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-2(2.789)^3 -2(2.789) =49  ,,,,,,ok
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Have  a  great  weekend