Question

Show that n^2-1 is divisible by 6

Answer 1

Answer:

n+1 multiply n-1

gives you nsquare -1square

then n+1 =6 n=5

n-1=6. n=7

now sub N in nsquare -1 then we get 24 which is divisible by 6

also sub N=7 weget 48 as it is divisible by 6

thus n^2-1 is divisible by6

Answer 2

Answer:

PLEASE MARK AS BRAINLIEST