Question

$frac{a+c}{ac} ×frac{5ac^2}{c^2-a^2}$
$3xy:frac{x^2}{3y^2}$
решите плииз

Answer 1

$frac{a+c}{ac}*frac{5ac^2}{(c-a)(c+a)}=frac{5c}{c-a}$

$3xy*frac{3y^2}{x^2}=frac{9y^3}{x};$