I WILL GIVE BRAINLIST <3 1.) Is the set of rational expressions closed under subtraction? Explain
p(x)/q(x) - r(x)/s(x) =

2.Is the set of rational expressions closed under multiplication ? Explain
(p(x)/q(x)) • (r(x)/s(x)) =

3. Is the set of rational expressions closed under division? Explain
p(x)/q(x) ÷ r(x)/s(x) =

THANK U SM <3