Question

Chứng minh:a-(b-c)=(a-b)+c

 

 

Answer 1

Ta có: a-(b-c)=a-b+c= (a-b)+c

=> a-(b-c)=(a-b)+c           ĐPCM

Answer 2

ta có:a-(b-c)=a-b+c=(a-b)+c

=>a-(b-c)=(a-b)+c (đpcm)

Answer 3

ta có:a-(b-c)=a-b+c=(a-b)+c

=>a-(b-c)=(a-b)+c (đpcm)