A=v`(t)=-12sin(3t-π/6)
x(t)=F(v)=4/3*sin(3t-π/6)+C
4/3*sin(π-π/6)+C=5/3
4/3*1/2+C=5/3
C=5/3-2/3=1
x(π/3)=4/3*sin(3t-π/6)+1
v(π/3)=4cos5π/6 =-4*√3/2=-2√3
a(π/3)=-12sin5π/6=-12*1/2=-6
(768:y+23)*10 при y=64
(768:4 + 23)*10 = (12 + 23)*10 = 350
M^2-x^2-2xy-y^2=m^2-(x^2+y^2+2xy)=m^2-(x+y)^2=(m-x-y)(m+x+y)