Question

сократить дробь помогите плиззз

Answer 1

$frac{9xy*3ab*4bz}{5ab*4xz*3axy}= frac{3*3*b}{5*x*a} = frac{9b}{5ax}$
$(frac{2ax}{yz} : frac{3bx}{ay} ): frac{9b^2z}{8a^2xy} = frac{2a^2}{3zb} * frac{8a^2xy}{9b^2z} = frac{16a^4xy}{27b^3z^2}$
$frac{4a^3b^2}{21a^5} * frac{28a^4}{3b^2} = frac{16a^7}{9a^5}$