Question

daca axb=90 iar axc=160 .Calculati ax(b+c)

Answer 1

axb=90
axc=160 
ax(b+c)=axb+axc=90+160 =250

Answer 2

     
$Se \;da: \\ a*b = 90 \\ a*c=160 \\ Se \;cere: \\ a*(b+c)=\;? \\ \\ Rezolvare: \\ a*(b+c)=a*b+a*c = 90+160= \boxed{250}$