Question

simplify the second part

Answer 1

√27+3√12
√3×3×3+3√3×2×2
3√3+3×2√3
3√3+6√3
√3(3+6)
9√3

Answer 2

$\sqrt{27} + 3 \sqrt{12} \\ = \sqrt{3 \times 3 \times 3 } + 3 \sqrt{3 \times 2 \times 2 } \\ = 3 \sqrt{3} + 3 \times 2 \sqrt{3} \\ = 3 \sqrt{3} + 6 \sqrt{3} \\ = \sqrt{3} (3 + 6) \\ = 9 \sqrt{3}$
hope this helps