Question

tinh

  86.(21-59)+59.(86-21)

Answer 1

86*21-86*59+86*59-59*21=21(86-59)=21*27=467

Answer 2

86 . ( 21 - 59 ) + 59 . ( 86 - 21 )

= ( 86 - 86 ) . ( 59 - 59 ) . ( 21 - 21 )

= 0 . 0 . 0

= 0 

Answer 3

=86*21-86*59+86*59-59*21

=86*21-59*21

=(86-59)*21

=31*21

=651

Answer 4

lê mạnh cường trừ sai rồi

Answer 5

651 nhe 

K CHO MINH NHA

Answer 6

 86 . ( 21 - 59 ) + 59 . ( 86 - 21 )

= ( 86 - 86 ) . ( 59 - 59 ) . ( 21 - 21 ) 

= 0 . 0 . 0 

= 0