(1-x^2)=2x(x+1)
1-x^2=2x^2+2x
1-x^2-2x^2-x=0
-3x^2-2x+1=0
D=2-4*(-3)*1=4+12=16
x1=2-4/-6 = -2/-6=1/3
x2=2+4/-6= -1
Ответ: х1=1/3, х2=-1
3
S= ∫ x^2 dx = x^3 = 3^3 - 0^3 = 27/3=9 кв. ед.
0 3 3 3
2
S=∫ 4-x^2 dx = 4x - (х)^3= ? = -16 - 16= -32/3= -10 (2/3)
-2 3 3