№1
y=2x^3-x^2-4x+5
y'=6x^2-2x-4
y'=0
6x^2-2x-4=0
D=4+96=100
x1=(2-10)/2=-4
x2=(2+10)/2=6
№3
y=x^2(2sinx+3)
y'=2x(sinx+3)+2x^2cosx
y'=2x(sinx+3+xcosx)
№1
y=2x^3-x^2-4x+5
y'=6x^2-2x-4
y'=0
6x^2-2x-4=0
D=4+96=100
x1=(2-10)/2=-4
x2=(2+10)/2=6
№3
y=x^2(2sinx+3)
y'=2x(sinx+3)+2x^2cosx
y'=2x(sinx+3+xcosx)