найдем точки пересечения
x^2 - 4x + 3 = 8
x^2 - 4x -5=0
х= -1 х = 5
x^2 - 12x + 35 = 8
x^2 - 12x + 27=0
х = 3 х= 9
x^2 - 4x + 3 =x^2 - 12x + 35
8х = 32
х = 4
1) интеграл от 4 до 5 (8-(x^2 - 4x + 3 ))= 8х -x^3 /3 +2x^2 -3x = 25 -125/3 +50 - 32 +64/3 -32 =11 61/3 = 31 1/3
2) интеграл от3 до 4 (8-(x^2 - 12x + 35)) = 8х - x ^3 /3 +6x^2 -35x = -27*4 -64/3 +96 +27*3 +9 -54 = 24 -21 1/3 =2 2/3
31 1/3 +3 2/3 = 35
и 
и ![(-1;3]](/tpl/images/0188/5648/df8ed.png)
и 
![(-4;-2]](/tpl/images/0188/5648/eac16.png)
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