To get the area of the border we proceed as follows;
Area=length*width
area of the frame=x*x=x^2
length of the painting=(x-2) inches
width of the frame=(x-2) inches
area=(x-2)(x-2)=x^2-2x+4
the area of the border will be:
Area=(frame area)-(area of the paint)
Area=x^2-(x^2-2x+4)
Area=(2x-4) in^2
the answer is (2x-4) in^2
