Answer:
<em>The coefficient of the squared expression in the parabolas equation will be 5.</em>
Step-by-step explanation:
<u>The vertex form of parabola</u> is:   , where
 , where  is the vertex point and
 is the vertex point and  is the coefficient of
 is the coefficient of  term.
 term. 
The vertex is given as  . That means,
. That means,  and
 and 
So, the vertex form will be:  
Given that, when the x-value is 4, the y-value is 3. So, plugging these values into the above equation, we will get.....

Thus, the coefficient of the squared expression in the parabolas equation will be 5.