Question 209378
3 radical a + 9 radical b+ radical b + 2 radical a
{{{3sqrt(a) + 9sqrt(b) + sqrt(b) + 2sqrt(a)}}}
Group like terms and add them
{{{3sqrt(a) + 2sqrt(a) + 9sqrt(b) + sqrt(b)}}} = {{{5sqrt(a) + 10sqrt(b)}}}
you can factor out 5 if you want to
{{{5(sqrt(a) + 2sqrt(b))}}}