Question

factorul comun din calculul 15 ori12ori3+12ori7ori3ori13 ? efectuati va rog metoda factorului comun

Answer 1

$15*12*3+12*7*3*13 \to \underline{12*3 (15+7*13)}= \\\\ = 36* (15+ 91)= \\\\ =36* 106= \\\\ =\boxed{3816}$

Answer 2

15x12x3+12x7x3x13=
12x3(15x1x1+1x7x1x13)=
12x3(15+91)=
36x106=
3816