The extreme value of ` x^2 - 5x +6` is

Find the extreme values of 11 cos^(2) x+ 15 sin x cos x- 9 sin^(2) x .

The extreme values of cos^(6) x + sin^(6) x are

The value of 5x^2 + 6x + 7 at x=-1

Discuss the extreme values of f(x) = x^5 -3 x^4+5

Find the extreme values of cos 2x+cos^2x

Find the extreme points of the following functions. Specify if the extremum is a maximum or minimum. Find the extreme values. y = 5x^2 - 2x^5