-57(67-34)-67(34-57)
= -57.67+57.34-67.34+67.57
= 34(57-67)=34.(-10)=-340
-57(67-34)-67(34-57)
= -57.33-67.(-23)
=-1881+1541=-340
Chúc bn hok tốt
-57(67-34)-67(34-57)
= -57 . 33 - 67 . (-23)
= -1881 + 1541
= -340
-57.(67-34)-67.(34-57)
= -57.33 - 67.(-23)
= -1881 + 1541
= -340