Question 968375
The lowest point on the graph is (-5,-4), with {{{system(x=-5,y=-4)}}} .
 If {{{x=-5}}} , {{{x+5=0}}} , then {{{(x+5)^2=0}}} , and {{{y=2(x+5)^2-4=2*0-4=0-4=-4}}}
For all other values of x, the y value is greater:
If {{{x<>-5}}} , then {{{(x+5)^2>0}}} , {{{(x+5)^2>0}}} , {{{y=2(x+5)^2-4>0-4}}} , and {{{y=2(x+5)^2-4>-4}}}.