Question

prove that the square of any positive integer of the form 5 q+ 1 is of the same form

Answer 1

According to Euclid....
let a n b are two integers positive integers apply Euclid division lemma n there exist a unique integer m & r satisfying a=bm+r
b=5
a=5m+r
reminder 1,2,3&4.....
continued answer in pic....
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Answer 2

According to Euclid....

let a n b are two integers positive integers apply Euclid division lemma n there exist a unique integer m & r satisfying a=bm+r

b=5

a=5m+r

reminder 1,2,3&4.