Question

I need help pleaseeeee Prove that: 12^13–12^12+12^11 is divisible by 7 and 19. BTW in format ______*7*19 :D

Answer 1

Each term has a common divisor of
`12^(11)`:

`12^(13)-12^(12)+12^(11)=12^(11)(12^2-12+1)=12^(11)\cdot133`

133 = 7*19, so the number in the blanks is
`12^(11)`.