Question

defination of subtracting
rational expressions

Answer 1

a/d-b/c
=
(ac-db)/dc

Answer 2

Adding and subtracting rational expressions is identical to adding and subtracting
with integers. Recall that when adding with a common denominator we add the
numerators and keep the denominator. This is the same process used with
rational expressions. Remember to reduce, if possible, your final answer.