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

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

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.

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

Find the values of the following expressions for x = 2. 4x – 3

Find the values of the following expressions for x = 2. x + 4

For what values of x, the following expressions are negative ? 15+4x-3x^(2)

Find the values of the following expressions for x = 2. 100 – 10x^3