Question 27
Draw a graph of {{{x^2-9x+5}}}:

{{{graph( 300, 300, -10, 10, -10, 10, x^2-9x+5) }}}

The area between the roots where the graph goes below the x axis, is the solution. In your case, it seems that there are no roots and therefore, no points such that the graph goes below zero. So, your answer is that the solution is an empty set.