Question

simplify the following

Answer 1

$12 \sqrt{3} + 5 \sqrt{3} - 7 \sqrt{3} \\ take \: \sqrt{3} \: common \\ \sqrt{3} (12 + 5 - 7) \\ = \sqrt{3} (10) \\ = 10 \sqrt{3}$
Hope it helps.__________

Answer 2

i think the answer is 10root3