Question

P+q/pq к знаменателю p²q
3/a+3 к знаменателю 2a+6
2/b-1 к знаменателю 4b-4

Answer 1

$frac{p+q}{pq}=frac{p(p+q)}{p^2q}\\frac{3}{a+3}=frac{2cdot 3}{2(a+4)}=frac{6}{2a+6}\\frac{2}{b-1}=frac{4cdot 2}{4(b-1)}=frac{8}{4b-4}$

Answer 2

$frac{p+q}{pq} = frac{(p+q)*p}{pq*p} = frac{p(p+q)}{p^2q}$

$frac{3}{a+3} = frac{3*2}{(a+3)*2} = frac{6}{2a+6}$

$frac{2}{b-1} = frac{2*4}{(b-1)*4} = frac{8}{4b-4}$