Question

Simplifique √12-9√3+√72

Answer 1

$\sqrt{12} - 9 \sqrt{3} + \sqrt{72} \\ \\ \sqrt{4 \times 3} - 9 \sqrt{3} + \sqrt{8 \times 9} \\ \\ 2 \sqrt{3} - 9 \sqrt{3} + 6 \sqrt{2} \\ \\ 6 \sqrt{2} - 7 \sqrt{3}$