Find the maximum or minimum of the following expressions as x varies over R.
`12x-x^(2)-32`

Find the maximum or minimum of the following expressions as x varies over R. 2x+5-3x^(2)

Find the maximum or minimum of the following expressions as x varies over R. x^(2)-x+7

Find the maximum or minimum values of the following expressions on R 2x + 5 – 3x^(2)

Find the maximum or minimum values of the following expressions on R i) 2x + 5 – 3x^(2) ii) 12x - x^(2)-32

Find the maximum or minimum values of the following expressions on R i) x^(2) + 6x – 27 ii) 3x^(2) + 2x + 7 iii) x^(2) - 12x + 32 iv) 2x^(2) + 3x + 1

Find the value of x at which the following expressions have maximum or minimum. 2x-x^(2)+7

Find the maximum or minimum value of the quadratic expression 2x-7-5x^(2)