Question 1129743


function has local maximum and minimum where first derivative is equal to zero:

and it is  {{{5 x^4 - 16 x^3 - 21 x^2 + 28 x - 44=0}}} at

{{{x= -1.89}}}
{{{x=4.03}}}

so, function is
{{{highlight(Increasing)}}} on:  ({{{-infinity}}},{{{-1.89}}}),({{{4.03}}},{{{infinity}}})

{{{highlight(Decreasing)}}} on: ({{{-1.89}}},{{{4.03}}})