Subtract simplify by collecting like terms if possible

Question

9 3�ã4-3 3�ã4
Would the answer be 6 3�ã4

Answer 1

hard to read your symbols but
6(3√(4a^3) ) is ok so far
but keep going

= 18√4 √a^3
= 18(2)(a√a)
= 36a √a