Question 1171702
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Hello,  in your post I see at least two  FATAL  ERRORS.


First,  as written,  this quadratic function represents a parabola opened up.
So,  this quadratic function has no a maximum,  at all,  but has a minimum.


Second notice is that the linear term with  x  in degree  1  is missed,
and instead,  two constant terms are written,  making the entire problem  UNNATURAL.


So,  as presented in your post,  the problem is  FATALLY  DEFECTIVE.