y=f(x0)+f'(x0)*(x-x0)
f'(x)=6x-5
f(x0)=f(-1)=3+5+2=10
f'(-1)=-6-5=-11
y=10-11(x+1)=10-11x-11=-11x-1
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f'(x)=6x^2-2x
6x^2-2x=0
3x^2-x=0
x(3x-1)=0
x=0 или 3x-1=0
3x=1
x=1/3
y(0)=0+0+3=3 - max
y(1/3)=2/27-1/9+3=(2-3+81)/27=80/27=2 26/27 - min
MK(2+3;-1-4;-5-7)=(5;-5;-12)
