Question 758259
The given equation form is good for finding zeros.  It is also good for finding the symmetry axis on which the vertex will be.  


Y has two zeros.  These zeros are at {{{x=2}}} and {{{x=4}}}.  Directly in the middle is x=3 which runs through the vertex.  {{{Y=-2(3-4)(x-2)}}}= the value for Y at the vertex.