Y = 4-x^2, y = x^2-2x
4-x^2=x^2-2x
2x^2-2x-4=0
x^2-x-2=0
x_(1)=-1; x_(2)=2
[m]S= ∫_{-1}^{2} ((4-x^2)-(x^2-2x))dx=∫_{-1}^{2}(4-2x^2+2x)dx=(4x-2\cdot\frac{x^3}{3}+x^2)|_{-1}^{2}=[/m]
[m]=(4\cdot 2-2\cdot\frac{2^3}{3}+2^2)-(4\cdot (-2)-2\cdot\frac{(-2)^3}{3}+(-2)^2)=...[/m]