Find the changes in the sign of the following expressions and find their extreme values.
`x^(2)-5x+6`

Find the changes in the sign of the following expressions and find their extreme values. 15+4x-3x^(2)

Find the changes of sign of the following expressions and find extreme values i) 15+4x-3x^(2) ii) 4x-5x^(2)+2

Find the changes in the sign of 4x-5x^(2)+2" for "x in R and find the extreme value.

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

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

Discuss the sign of the following expressions when x is real i) x^(2)-5x+6 ii) x^(2)-x+3

Discuss the sign of the following expressions when x is real i) x^(2)-5x+6 ii) x^(2)-x+3

If x be real , find the least values of each of the following expressions and the corresponding values of x: 3x^2-6x+8