If $s$ is a real number, then what is the smallest possible value of $2s^2 - 8s + 19 - 7s^2 - 8s + 20$?
This is a DOME shaped parabola......there will be no MIMIMUM value ...or - ∞
Simplify as
-5s^2 - 16s + 39
This is a parbola that turns downward.....there is no min
+1415 
+37144 
