Question

ПЖ СРОЧНО нужно капе​

Answer 1

$\displaystyle 1)7a(-12d)=-7a*12d=-84ad\\\\2)-\frac{5}{6}(-\frac{3}{35}m)*\frac{14}{15}=\frac{1}{2}*\frac{1}{7}m*\frac{14}{15}=\frac{1}{7}m*\frac{7}{15}=m*\frac{1}{15}=\frac{1}{15}m$