Question

13.If m and n are odd positive integers, the mun' is even, not divisible bý 4. Justify. ​

Answer 1

$step \: by \: step \: explation$

Since m and n are odd positive integers, so let m = 2q + 1 and n = 2p + 1 , °• m² + n² = ( 2q + 1 )² + ( 2p + 1 )² . = 4( q² + p² ) + 4( q + p ) + 2 .