Simplify completely: $$ -9 \sqrt{27}-3 \sqrt{3} $$ Answer $$ =\square $$

Question

UpStudy AI · Accepted Answer

To simplify the expression $$ -9 \sqrt{27} - 3 \sqrt{3} $$:

1. **Simplify $$\sqrt{27}$$:**
   $$
   \sqrt{27} = \sqrt{9 \times 3} = \sqrt{9} \times \sqrt{3} = 3\sqrt{3}
   $$

2. **Substitute back into the original expression:**
   $$
   -9 \times 3\sqrt{3} - 3\sqrt{3} = -27\sqrt{3} - 3\sqrt{3}
   $$

3. **Combine like terms:**
   $$
   -27\sqrt{3} - 3\sqrt{3} = -30\sqrt{3}
   $$

**Answer $$ = -30\sqrt{3} $$**
$$ -30\sqrt{3} $$

Simplify completely: \( -9 \sqrt{27}-3 \sqrt{3} \) Answer \( =\square \)