y=x^2-6x-9, y=6x+23-x
6x+23-x^2=x^2-6x-9
2x^2-12x-32=0
x^2-6x-16=0
D=(-6)^2-4*(-16)=36+64=100
x_(1)=(6-10)/2=-2; x_(2)=(6+10)/2=8
S= ∫ ^(8)_(-2) (( 6x+23-x^2)-(x^2-6x-9))dx
=∫ ^(8)_(-2)(32+12x-2x^2)dx=
=(32x+12*(x^2/2)-2*(x^3/3))|^(8)_(-2)=
=(32*8+6*8^2-(2/3)*8^3 - 32*(-2)+6*(-2)^2+(2/3)*(-2)^3=...