Let a and b be integers. By examining the four cases
i. a, b both even,
ii. a, b both odd,
iii. a even, b odd,
iv. a odd, b even,
find a necessary and sufficient condition for a2 − b2 to be odd.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.