Subtracting rational expressions
warm-up
find the least common denominator for the following rational expressions.
18
-5r
r + 7
7-4 72 - 5r+4' 12 - 48-5
x (-1)(r - 4)(r – 5)
(r- 1)(r + )
c (r - 1)(r + 1)(r – 4)(7-5)
(r-1)(r + 1)(r + 4)(– 5)
retry