Try to explain that the 11th power of 5 - the 10th power of 5 + the 9th power of 5 can be divided by 21

Try to explain that the 11th power of 5 - the 10th power of 5 + the 9th power of 5 can be divided by 21

The 11th power of 5 - the 10th power of 5 + the 9th power of 5
=The 9th power of 5 (5 & # 178; - 5 + 1) = the 9th power of 21 * 5
So the 11th power of 5 - the 10th power of 5 + the 9th power of 5 can be divided by 21