Y`=3x²+6x-9=3(x²+2x-3)=0
x1=x2=-2 U x1*x2=-3
x1=-3 U x2=1
+ _ +
--------------(-3)--------------(1)-------------------
возр убыв возр
4(х^2-1)
5(t-2s)^2
c(1-27d^3)
v(u^3+w^3)
4.
-16(-4-4)-(-4-8)^2
64-64-16+64=48
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!