Question

1.2.3. . . 9-1.2.3. . .8-1.2.3. . .7.8²

^{giup minh bai nay nha. Nhanh nhanh cang tot nha.} 

Answer 1

1.2.3......9-1.2.3....8-1.2.3.....7.8²

= 8!..9-8!..1-8!..8

=8!(9-1-8)

=8!.0

=0

k cho mk nhé

Answer 2

=1.2.3...8.(9-1-8)=0

Answer 3

1.2.3...9 - 1.2.3...8 - 1.2.3...7.8²

= 1.2.3...9 - 1.2.3...8 - 1.2.3...8.8

= 1.2.3...8(9 - 1 - 8)

= 1.2.3...8.0

= 0