Question

(ах + в) ∙ * = 2аmx +2вm ​

Answer 1

$\displaystyle\bf\\(ax+b)\cdot *=2amx+2bm\\\\\\(ax+b)\cdot *=2m(ax+b)\\\\\\(ax+b)\cdot \boxed{2m}=2amx+2bm$