You can put this solution on YOUR website! What is f(x)=-2x^2+x+3 in standard form?
-----
Complete the square.
----
-2x^2 + x = y - 3
-2(x^2 - x/2 + (1/4)^2) = y - 3 - 2(1/4)^2
---------
-2(x-1/4)^2 = y - 25/8
==============
Cheers,
Stan H.
=====================