Question

[Ultraman Geed]

Cho a > b ; tinh | S | biet : 

   S = - ( a - b - c ) + ( -c + b + a ) - ( a + b ) 

Answer 1

[asadsfsgsgreh]

     S=-a+b+c-c+b+a-a-b

       =(-a+a)+(b-b)+(c-c)

       =-a+b

\(\Rightarrow\)/S/=/-a+b/=a+b

Answer 2

[Phạm thị phương thảo]

S=-a+b=>|S|=|-a+b|=a+b