+845 
My working out is abit long so please bare with me as i have tried this multiple times and still failed:
i was told to always find the momentum and coefficient of restitution for these questions then do simultaneous equations
momentum: \(mua+mub = mva + mvb\)
\(-2(0.3) + 3(0.2) = (0.3)va + (0.2)va\)
\(0.3va + 0.2vb = 0.5\)
coefficient of restitution:
\(0.8=\frac{vb-va}{3-2}\)
\(-va + vb = 0.8\)
simultaneous:
0.5vb = 0.74
vb = 1.48 va = 0.68
However the markscheme says my answer should be VA=-0.6 VB=3.4
