Question 64846
{{{( 5sqrt(m^2p^7)*3sqrt(m^5p) )}}}

{{{( 15sqrt(m^7p^8) )}}}[multiply]
{{{(15sqrt(m^3m^3m^1p^4p^4))}}} [factor the radical if possible]
{{{(15m^3p^4sqrt(m))}}}  [factor out the square roots]