domain of f(t)=(4-t^2)/(2-t)
We save the definition: f(t) = 4 -t22 -t
Let's evaluate the domain of 4 -t22 -t
For the expression 4 -t22 -t to be defined, we must have: 2 -t ≠ 0
ⓘ We add t to both sides
2 ≠ t
▶Domain of definition:   t ≠ 2