Four Fours/Lemmata/Two Fours/48/Solutions

Puzzle: Two Fours: $48$

Using exactly $2$ instances of the number $4$, the task is to write an expression for $48$, using whatever arithmetical operations you consider necessary.

Solutions

Solution $1$

$48 = 4! + 4!$

Solution $2$

$48 = 4! \times \sqrt 4$