A strip of wire of length 32 cm is cut into two pieces. One piece is bent to form a square of side x cm. Write an expression, in terms of I and x for the length of strip of wire

Show that I = 13 - 2x

The sum of the areas of the square and the rectangle is represented by S.

Show that S =- x^2-6x +39

Calculate the values of x for which S = 30.25