Question 331468
N(t)=-3t^3+23t^2+8t
N(t)=-t(3t^2-23t-8)
N(t)=-t((3t^2-24t+t-8))
N(t)=-t(3t(t-8)+1(t-8))
N(t)=-t(3t+1)(t-8)
..
N(3)=-3(9+1)(3-8)
N(3)=150