Question

$sqrt{2x} +2leq 5$

Answer 1

$sqrt{2x} leq 3 \ 2x geq 0 \ x geq 0 \ 2x leq 9 \ x leq 4,5 \ left { {{x geq 0} atop {x leq 4,5}} right.$
x∈[0; 4,5]