Question

УПРОСТИТЕ СРОЧНО ВЫРАЖЕНИЕ

Answer 1

$1); frac{18m^2n^3}{7pq}cdot frac{14p^2q}{27m^3n^2}=frac{4np}{m}\\2); frac{2m-n}{2mn}:frac{}n-2m{}m^2n^2=frac{(2m-n)cdot m^2n^2}{2mncdot (n-2m)}=-frac{mn}{2}\\3); (10a^2bc^3)^2cdot (frac{2c}{5ab^2})^3=frac{100a^4b^2c^6cdot 8c^3}{125a^3b^6}=frac{32ac^9}{5b^4}\\4); frac{z-t}{z+t}:(z-t)=frac{z-t}{(z+t)(z-t)}=frac{1}{z+t}$