Texas HS Precalculus Question of the Day

$\{-2,-1,1,2\}$

$\left\{-\sqrt{5},,\sqrt{5},,-1,,1\right\}$

$\left\{-\sqrt{\tfrac{5}{3}},,-1,,1,,\sqrt{\tfrac{5}{3}}\right\}$

$\left\{-\sqrt{\tfrac{3}{5}},,\sqrt{\tfrac{3}{5}},,-1,,1\right\}$