Sqrt-корень
1.x^2-4x-2=0
D=(-4)^2+4*2*1=24
x1=(4-sqrt(24))/2
x2=(4+sqrt(24))2
x1=2-sqrt(6)
x2=2+sqrt(6)
x^2-4x-2=(x-(2-sqrt(6))*(x-(2+sqrt(6))
1) mx-my=m*(x-y)
2)3a+9a\2=a*(3+9\2)
...........................
y'=2x-25/x^2
2x-25/x^2=0
(2x^3-25)/x^2=0
x=(25/2)^(1/3)
y''=2+50/x^3
y((25/2)^(1/3))=(25/2)^(2/3)+25* (2/25)^(1/3)=(25/2)^(2/3)+1250^(1/3)