Warm-up
my o
w n
find the least common denominator for the following rational expressions.
18 -5r r+7
- 4' p² – 5r+ 4 p² – 4r – 5
(r-1)(r - 4)(r-5)
(r - 1)(r + 4)(r-5)
(r- 1)(r + 1)(r - 4)(r-5)
(n-1)(r + 1)(r + 4)(r-5)