Hey there :)
2 × √36
We know that 36 is a perfect square of 6
√36 = 6
Therefore
[tex]\boxed {2 \ times \ 6 } [/tex] = 2 × 6 = 12
Your answer will be [tex]\boxed {Option \ C }[/tex]
12² = 144 which means √144 = 12
Therefore: [tex]\boxed {Option \ E \ is \ another \ answer } [/tex]