Any idea how to approach this problem

Question

A rectangular meadow will have a fence around it. The long side is $130$ m longer than the short side. The sides lengths can be written $x$ and $x+ 130$. Write a simplified expression for 1) circumference 2) area any idea will be helpful .

Answer 1

$\text{Circumference}=2(x + x + 130)= 4x+260$

$\text{Area}=(x+130)\cdot (x)=x^2 + 130x = x^2 + 130x + 65^2 - 65^2 = (x+65+\sqrt{65})(x+65-\sqrt{65})$