Find the area enclosed by parabola y = x, Square-1 and straight line x = 2, y = 0

Find the area enclosed by parabola y = x, Square-1 and straight line x = 2, y = 0

Find the area enclosed by parabola y = x & # - 1 and straight line x = 2, y = 0
Let the area of the problem be s, then s can be obtained by definite integral;
The original function of function f (x) = x & # 178; - 1 is f (x) = (X & # 179 / 3) - X,
Then s = ∫ (2,1) | (X & #³ / 3) - x = [(2 & ³ / 3) - 2] - [(1 & ³ / 3) - 1] = 4 / 3