[tex]\huge{\boxed{4(h+6)}}[/tex]
Let's start by writing out their factors.
4: 1, 2, 4
24: 1, 2, 3, 4, 6, 8, 12, 24
The greatest factor that [tex]4[/tex] and [tex]24[/tex] have in common is [tex]4[/tex].
Factor out [tex]4[/tex] from both terms. [tex]\boxed{4(h+6)}[/tex]