Question

2v150-4v54+6v24

????

Answer 1

$2 \sqrt{150}- 4 \sqrt{54} + 6 \sqrt{24} = \\ 2 \sqrt{ 5^{2}.6 } - 4\sqrt{3^{2}.6 } + 6 \sqrt{ 2^{2}.6 } = \\ 10 \sqrt{6} - 12\sqrt{6} + 12 \sqrt{6} = \\ 10 \sqrt{6}$