Question

Упростите выражение (p/q-q/p)*(p/p/q-p/p+q)

Answer 1

((p^2-q^2)/qp)*(1/q-p/(p+q))=
((p-q)(p+q))/pq*((p+q-pq)/q(p+q))=
((p-q)(p+q-pq))/p(q^2).