a) [√104] = 10; [∛625] = 8
[√104] > [∛625]
b) [∛-15] = -3; [-\sqrt[4]{20}] = - 2
[∛-15] < [-\sqrt[4]{20}]
c) {√31,36} = 0.6; {-√0,1225} = -0.65
{-√0,1225} < {√31,36}