ответ
x²-6x+y²+6y+z²-4z=11
(x-3)²+(y+3)²+(z-2)²=33
R²=33
S(сфера)=4*π*33=132
x=4
(4-3)²+(y+3)²+(z-2)²=33
(y+3)²+(z-2)²=33-1
(y+3)²+(z-2)²=32
r²=32
S(сеч)=π*r²=32π
ответ
x²-6x+y²+6y+z²-4z=11
(x-3)²+(y+3)²+(z-2)²=33
R²=33
S(сфера)=4*π*33=132
x=4
(4-3)²+(y+3)²+(z-2)²=33
(y+3)²+(z-2)²=33-1
(y+3)²+(z-2)²=32
r²=32
S(сеч)=π*r²=32π