The area of the rectangle ABCD is 28[tex]cm^{2}[/tex]

a) What is the length of side AB in terms of x?

length of AB = (Answer here) (1)

b) If the area of rectangle ABCD is 28[tex]cm^{2}[/tex], we can show that [tex]x^{2}[/tex] + ax = b where a and b are integer values.

Work out the values of a and b.

a = (Answer here) (1) b = (Answer here) (1)