\(\left(a+b\right)\times c=a\times c+b\times c\)
\(a\times\left(b+c\right)=a\times b+a\times c\)
\(a\times\left(b-c\right)=a\times b-a\times c\)
\(a\times b-a\times c=a\times\left(b-c\right)\)
( a+b)xc------axc+bxc
a x ( b + c)----- a x b + a x c
a x ( b-c )------ a x b - a x c
a x b-a x c-------a x ( b - c )