Question 1026414
If vertex is what you mean for "turning point", then this occurs in the middle of the two roots.


The x value of the vertex will be {{{(1/2)(-5/2+3)=(1/2)(1/2)=1/4}}}.


{{{y*forVertex=(2(1/4)+5)(1/4-3)=(5+1/2)(-2&1/4)=(11/2)(-9/4)=-99/8}}}.