If x be real, find the maximum value of the expression -2x^2 + x + 3
differentiate the expression to get x = 1/4.
substitute x = 1/4 in the expression to get 3.125.
There's a way to know this value is the maxima or the minima, by double differentiation and substituting the value. Can't remember precisely. Can someone please explain?
Who says elephants can't dance?