Question 43149
3b[SQRT(27a^5b)] + 2a[SQRT(3a^3b^3)] 

=3b[3a^2sqrt(3ab)] +2a[absqrt(3ab)]

=9a^2b sqrt(3ab) + 2a^2b sqrt(3ab)

= 11a^2b sqrt(3ab)

Cheers,
stan H.