Asked by Helen

Prove that:

12^13–12^12+12^11 is divisible by 7 and 19.
Answered by Reiny
12^13–12^12+12^11
= 12^11(12^2 - 12 + 1)
= 12^11 (133)

but 133 = 7*19
since 133 is divisible by both 7 and 19, the original expression is also divisible by 7 and 19
Answered by idk
I dont understand
Answered by Elian
The answer is 12^11
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