area = length × length ( in a square)
area of larger portion = (x + 3 ) × (x + 3 ) = x² + 6x + 3
area of smaller portion = (x - 2) × (x - 2 ) = x² - 4x + 4
area of shaded region = area of larger portion – area of smaller portion
= ( x² + 6x + 3) – ( x² - 4x + 4)
= x² + 6x + 3 - x² + 4x -4
= 10x – 1
area of shaded region = 10x – 1
