Answer:
Actually there are two answers: -3 and 0, depending on how the expression is written.
Step-by-step explanation:
If the rational expression is x - 4/x - 6, we have:
x - 4/x - 6
= 4 - 4/4 - 6
= 4 - 1 - 6 = 4 - 7 = -3
If the rational expression is (x - 4)/(x - 6), we have:
(x - 4)/(x - 6)
= (4 - 4)/(4 - 6)
= 0/-2 = 0
