Question

Shorten the formula:

Answer 1

Answer:

$\sf \sqrt{6 + 2 \sqrt{5 - \sqrt{3 + \sqrt{48} } } } \\ \sf8 \sqrt{5 - \sqrt{3 + 4 \sqrt{3} } } \\ \sf8 \sqrt{5 - \sqrt{7 \sqrt{3} } } \\ \sf8 \sqrt{5 - \sqrt{147 } } \\ \sf8 \sqrt{5 - 12.12 } \\ \sf8 \sqrt{ 7.12} \\ \sf8 \ \times 2.66 = 21.28$