Four Fours/Lemmata/Two Fours/8/Solutions

Puzzle: Two Fours: $8$

Using exactly $2$ instances of the number $4$, the task is to write an expression for $8$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$8 = 4 \times \sqrt 4$

Solution $2$

$8 = 4 + 4$