Answer:
all reals except 3 & 4
Step-by-step explanation:
recall you cannot have a 0 in the denominator.
any values of x that would produce a 0 in the denominator are excluded from the domain
factor [tex]x^{2} -7x+12[/tex] Factors -3, -4
(x-3)(x-4)
x cannot be 3 or 4
