Question 1060935
.
(b)  


<pre>
   y = -2(x-3-i)(x-3+i) =


     = (-2)((x-3)-i)((x-3)+i) = 


     = {{{(-2)((x-3)^2-i^2)}}} = 

     = {{{(-2)((x^2-6x+9)+1)}}} = 

     = {{{-2x^2 + 12x - 20}}}

       {{{highlight(y= -2x^2 + 12x - 20)}}}   -----standard form
</pre>

What "josgarithmetic" produced is a vertex form.